Where is the best place to go to go for freon i.e., air conditioning service?
Typically a shop that does that kinda work.
Make sure they are equipped to do it correctly. Ask how many Honda AC system they typically repair a month maybe. It’s important that the job be done correctly, as allsorts of grief is possible otherwise. You might want to review this 4-part tutorial on auto ac maintenance & repairs for reference.
A specialty or a good independent shop, avoid chain stores. Ask around for recommendations, friends, family, coworkers, etc.