We have Good Sam roadside. It was cheaper and more benefits for large buses than AAA. And I confirmed with them that they would tow it even if it's a full size school bus.
My build thread:http://www.skoolie.net/forums/f11/build-thread-for-haulin-oats-and-goats-11237.html#post113500
A gal, a guy, three cats, two dogs, one rabbit, and one goat, traveling the country together.