Make sure you get something with a couple of slides, at least one big slide in the living area and one, wardrobe or bed, in the bedroom. Some trailers in the 30-32 foot range, overall length, are pretty roomy and comfortable. We have a Jayco Eagle HT 26.5 RLS that is almost 30' long and is very comfortable when we camp for a week to eight days but have not yet done the two to three month deal. One couple on the Jayco Owners web site said they spent almost three months in Florida in a 23.5 with is about 26' long. Said they enjoyed it very much. Jayco has some touring models that have a pretty large fresh water capacity and fit in the 30-32 foot range. As do a number of other manufacturers.