Both bag and pull cart! Not only if they fit but how easy it is to get them in and out of the trunk. 
Flat-bottomed trunks and cargo areas are best. Deep-welled trunks like many Ford sedans have had are a literal pain to load and unload anything from such as grocery bags, luggage, sports equipment, etc.
I actually put my bag in the back seat of my old Focus and the cart in the trunk for that reason. My oldest son is 9 now, so at least I don’t have to pull my own cart if I don’t want to 
Didn’t even have to check for my 59 Pontiac. The trunk was huge. On our 61 Merc. my dad could get the outboard motor in along with all the luggage and picnic basket for a resort vacation.
Oh I know, I too had a ‘59 Pontiac, we could measure that trunk by the number of bodies it could hold.
We both probably cruised Lake Street to Porkies.
I was in Sioux Falls most of the time. It was the Barrel there but not Porkies. But yeah been to Porkies too.
That is all true, but if one dared to load the trunks of those old land yachts to their full capacity, the headlights would be pointed at the sky and the car’s tail would be dragging. The excessive length of the rear deck on those old cars resulted in a huge trunk, but unless one added “helper springs” in the back, it just wasn’t practical to use the full capacity of the trunk.
My 66 Fleetwood had the biggest trunk I’d ever seen. To replace the rear speakers - you remove them from the trunk. I was able to lie down in the trunk. I’m 6’3.
My first car, a 64 Pontiac Tempest… the smallest in the Pontiac lineup that year, could hold 4 people in the trunk snugly with a full size spare.
GM forced a “2 golf bag” mandate on the Pontiac Fiero’s trunk when it was designed as a minimum trunk size.
Th at sounds like a good mandate to me. I know a guy who refused to buy a car because his clubs and golf cart wouldn’t fit in the trunk. The salesman couldn’t understand his decision. I could.
My parents 1965 Olds 98 land yacht had a flat trunk that easily held golf bags and pull carts for our family of four golfers.
Despite getting only about 8-12 mpg its V8 engine could easily handle speeds up past 90 mph. As a young driver I once had it up that fast on the Garden State Parkway getting away from punks trying to play games. And Mom once drove it some miles on I-44 at that kind of high speed outrunning a tornado, a trip I considered no fun at all.
Even though Oklahoma became a “wet” state in 1959, bootleggers hauling cases of booze from neighboring states were still plentiful when I was growing up there in the 1960s. Their cars were easy to spot. Unloaded, the rear ends were sky high due to the modified shocks and springs. Loaded, the back ends almost scraped the pavement.
Arkansas, where we also lived for awhile, had an odd mix of being “wet or dry” county by county. Bootleggers hauling cases of legal booze from wet counties into dry counties did plentiful business.
A couple of years ago, here in St. Louis, I spotted an old land yacht from the early 1970s with oversized rear shocks but badly sagging rear end or overloaded trunk and immediately thought bootlegger!
When you say his golf cart wouldn’t fit in the trunk…I’m thinking there must be more than one thing referred to as a “golf cart”. Otherwise, he wanted a helluva trunk. I’m not a golfer, so pardon my admitted ignorance on the subject!
Many years ago, when one of these states was still largely “dry”, the Governors of North Carolina and South Carolina were having a conversation, and one of them said to the other, “It’s a long way between drinks in your state”. I think that it was the NC Governor who said that, but it might have been the other way around.
Many years ago, my brother bought a used Chevelle from a co-worker. Even though it had a very short rear overhang, the previous owner had to install air shocks in the back in order to not “ground” the undercarriage when backing out of her very sloped driveway.
I know a guy who shot himself in a non fatal area with a high powered rifle while exiting his truck deer hunting. He was also cheating on his wife with another guy’s wife around that time. The other guy tended to hunt that same area…so there was some speculation. And like Forrest Gump said, “That’s all I have to say about that”.
This kind of Golf Cart.
Gotcha, I assumed it wasn’t the kind people ride around and drink beer on. Well, most people wouldn’t.
@Scrapyard-John Many of us golfers own our own pull carts rather than rent one at the golf course. Older styles like mine have two wheels, are light weight, and not overly bulky. However, many newer ones are three wheeled deluxe bulky monsters which, in my view, rather defeat the purpose. They may roll easier but weigh far more which is a literal pain to drag or push around the course and pretty impossible to fit in a sedan trunk.
Someone with enough muscle to manhandle loading and unloading those bulky, heavy deluxe carts would definitely not fit one in most sedan trunks, partly because it needs more vertical space than a trunk.
Dad and I used to put our two carts in the little trunk of my 1973 Corolla and the golf bags in the car, one on the rear seat and one on the rear floor. When I played alone I could just fit both my cart and bag in the trunk.
A few years ago I retired using my beautiful but very heavy full sized leather golf bag and began using a smaller, much lighter bag I can either pull on the cart or carry, albeit with a skeleton set of clubs to reduce weight when carrying.
@MikeInNH Ah, your comment posted while I was replying. Now THAT is a very nice cart!!! Doesn’t look heavy, isn’t bulky, has three wheels for better stability and easier rolling. Nice!!!
I’ve played so little in recent years I can’t justify the cost of buying a new cart like that. I still use my forty-seven year old cart and set of clubs. They still work. 
I have the 3-wheel one and it’s extremely light. Bulkier, but still light.
I still use my grandfather’s old set of “Golden Bear” Irons 
I actually prefer them to the new lightweight irons today