Have you checked out Motorhome Magazine's Dinghy Towing Guides? There are several years on their website.
Assuming that you auto isn't on that list, then contact Remco Towing,
www.remcotowing.com to see if there's some way of making it towable 4-down. You could, of course, put it on a dolly or a trailer, but towing it 4-down would simplify things immensely.