Those bolts are going to be a beach to get off.
An impact wrench, air or electric, is highly recommended. These "rattle" the bolts loose, rather than just twisting them until they break.
I am another who never leaves home without a double full set of sockets, 1/4, 3/8, and 1/2" in both metric and American, as well as a bunch of extensions, universals, and universal sockets....
As we get more and more serious about full-timing, my biggest thoughts go toward "what in the he!! am I going to do with my TOOLS?