If you havent had one before, get yourself a used little Travel Trailer that has the bathroom/kitchen/bedroom and toyhauler. You can tow them with any 1/2 ton pickup (as long as you dont go too big) and they can be had for a great low price. Also, when you want to get rid of it, you will get about what you want out of it.
This will then let you figure out what you like/don't like/really want out of your long-term rig.
We did that, did some camping, some Rallys and ended up with our must-have list and our want list...made it easier to show when we were ready to make the purchase.