Glennmac, too broad a topic./w3tcompact/icons/wink.gif We've had slide-in pickup camper, two motorhomes, two conventional travel trailers, and one fifth-wheel trailer; lived full time in an RV wandering the country for almost 6 years. First step; join the Good Sam Club so you get their monthly magazine and from them you can buy what I consider to be the best campground directory for North America (although there are others that some like better). You'd probably be amazed at the number of places you can stay.
Advantages of a trailer over the motorhome are price (you can buy a darned nice truck and trailer for less than comparable living space in a motorhome), can change engines (tow vehicles) without changing the home, will have fewer problems from inactivity (leaving it parked for extended periods of time in one spot), if the tow car should have to go into the shop for engine, tranmission, or other repairs, home isn't there also. A fifth-wheel trailer is more stable than a motorhome, but the motorhome is usually more stable than a conventional pull trailer. Only one engine to maintain (you'll definitely want to tow a car or pickup if you spend much time in a motorhome).
Advantages of the motorhome . . ., well, I like to start early and the wife likes to sleep late (by the time I got her out of the trailer into the truck, we'd both be in a bad mood/w3tcompact/icons/laugh.gif), in the motorhome I could take off while she was still in bed. You sit up high with great visibility, usually more room and comfort than a pickup. The co-pilot can go make another pot of coffee (or pour another cup) while you're going down the road (set the coffee maker in the sink). Or of course, get a glass of water, soda from the refrigerator, go to the bathroom, etc. More passenger space if you want to take someone else with you. Easier to back up (when you don't have the towed car on behind) because it's one vehicle instead of backing a trailer.
Most motorhomes have a generator, while most trailers do not, although you can get trailers with generators (our fifth-wheel had one). Many of the motorhomes are "basement" models; more storage space than most trailers. If it happens to be raining when you stop, you don't have to go outside to go to bed.
Oh well, lots of other things, but that's a start. I like the motorhome best myself, but I think a truck and fifth-wheel is the safest, most practical way to go.