I don't know about prices but they have those "PODS" things that you can put the 4 wheeler, lawn mower and all your garage stuff in and they drop it off, pick it up, and move it and deliver it for you and you keep it as long as you need it. they might have a good enough price to be a good choice to do all your stuff for the move.
check them out:
http://www.pods.com/?eadid=phone::88...dFyBoCJV3w_wcB
that should take care of most of your stuff, the boat I would think a boat cover would be the best solution, maybe even one of those winter plastic shrink wraps even.