My wife and I traveled full time for 7 months in our 28 ft CCD Int'l, with a large golden retriever with us, and we were VERY comfortable. I think most state campsites can only fit 30' or smaller, so you should look at lengths of 30' or smaller if you plan to use. However, size of trailer depends on how much space you need. Some people could probably get buy on a 25' full time if they didn't mind the cramped quarters, others may not be able to stand it at all and would need at least 34' with a slide out. It's really a personal decision. Go to a dealer with different sizes and see what you think may work for you. Only you will know the answer as everyone's needs and lifestyles differ.
'05 Int'l CCD 28' >sold then 8 years later> '13 FB Int'l CCD 25'
'05 Ford Excursion Ltd >> '14 Chevy Silverado 1500 Z71 LT Crew
6.0L Diesel 3.73 >> 5.3L V8 Ecotec3 3.42
Titus Moto Lite, Nerve Cruiser
Mike, Angela, the kiddies & 10 yr old puppy, Kenzie, our Golden Retriever and best friend ever