OP, unless you plan on buying a new truck before you buy a trailer, THIS IS THE MOST IMPORTANT QUESTION IN THIS THREAD.
Your truck will dictate what you will tow. Period.
Jerry
Probably gonna get a truck to match the RV we get... leaning heavily to a slide in bed truck camper. Seems to be the most versatile. Small lightweight camper in an F-150. Still doing research though. Purchase will be about a year away, so will probably also going to take the advice and rent a few