I bought a used '14 CRV specificially for the purpose of towing 4 down. I do not yet own a coach but will soon. My impressions of this car (not from a towing perspective) is that it is a good car, well made but a bit noisy. I wear hearing aids and the road noise makes it difficult to hear the radio at times.
There are some fixes to prevent the dead battery issue. The manual suggests you pull a fuse which can be bothersome every time you want to tow. Installing a fuse switch makes it much easier. Try this: http://www.crvownersclub.com/forums/26-racks-hitches-towing/51441-towing-crv-build-switch-pull-fuse.html