I did a lot of barrel racing pulling a two horse trailer behind a fifteen passenger ford van F-350.  No problems.  I didn't have a real rv, I just built a bunk, a dry bathroom, a countertop with a gas camp stove, and plastic bins for storage.  Worked very well for me for several years.

Marla

Really, truly, I looked into this combo before getting my current trailer.  Be CERTAIN of the weights and capacities.  Those RV hitches are NOT NOT NOT always equipped to handle a horse trailer. They can tow your little runabout car behind, but that weighs FAR LESS than a horse trailer. Load distributing hitches help, a light trailer helps, but roll it across a scale so you know for sure how much weight you've got. Know your tongue weight when loaded.   Ask this question on an RV board. They have lots of information.  Figure in how many horses, saddles, hay, water, tack, etc. you will be putting in the trailer.  I've seen people hauling horses with their RV without problems, but they very likely may be exceeding their weight capacity on their hitch. Ignorance can be bliss until disaster strikes.  You can have it beefed up by a welding shop, but you can't be certain of its capacities, as you can be with a factory installed hitch.

I don't want to rain on your parade or anything, I just want to make sure you play it safe.  I was going to get a brenderup trailer just so I could haul my fat horses behind an RV, then I came across my GN with LQ and fell in love. I went to the RV dealer, and asked them to show me an RV with a hitch that could do the job....he took me to a dutch star diesel pusher built on a freightliner chassis..  But it was the only RV that had a frame and hitch that was approved for hauling as much weight as I needed to pull.  Needless to say, the diesel bus stayed on the show room floor.

Amanda