A Real newbee

Hi all, the wife and myself are looking into an RV to run away in, kinda. I am retired soon to be followed by her and we are way into adventures. We were at a RV show in LA last week and were looking at Motor homes but they have gotten real expensive, more so that I remembered. We do have an older F350 dually cab and a half I used to pull horse trailers years ago. The largest was a 33ft steel King and it was pretty heavy so I imagine it will pull perhaps a 28-30 5th wheel without too much trouble. That being said I have begun looking for used trailers that would accommodate the two of us. Any suggestions on brands or models would all be info I don't have to learn the hard way, we felt keeping it a bit smaller might allow us entrance to more places????
Thanks, Bill