Someone mentioned AAA RV-Plus, which I also have, but it reminded me of another thing to be aware of. If you get roadside assistance, from AAA or Good Sam or whoever, be sure that your plan includes a provision for towing both vehicles if necessary. If your tow vehicle needs to be towed, you don't want to leave the trailer sitting there on the side of the road to be hit or broken into.
2013 Surveyor SP220
2010 Silverado LT 5.3 V8
The world is a great book, of which those who never stir from home
read only a page. - St. Augustine