Adding weight to the Ranger is a good idea. Don’t put the weight too far back in the bed. Somewhere between the cab and the rear axle is best.
Adding weight to the Camry is less useful. Again, if you add weight put it as close to the rear seat as possible. This will keep the car closer to a 50/50 balance. If the weight is too far in the back of the trunk it could cause the rear end to swing out too much too fast. 100lbs of sand and/or salt can’t hurt and might come in handy.