We hope to escape a winter and RV down to Florida from up here in cold Toronto. Five months is indeed a long camping trip
The thought of full timing for me is a crazy one...you'll want a nice/large RV for sure. I'd love to hear how its going from time to time. Curious about where you're staying/the cost...have you a spot booked or are you planning on different sites... maybe some boon docking maybe some Walmart? Five months in Florida sounds really warm, nice, and expensive mind you, close to the ocean/beach camping would be great!
Good luck and keep us posted