Just go buy one of those marine tool kits, it comes in a nice plastic kit, stows well and has most of what you need. Supplement that with some atomic tape (good stuff), zip ties, fuses, wood plugs, oil/lube/parts etc, as needed. (I spray the tools with a anti corrosive spay and lay a diaper (rag) on the tools and close the box up. (they stay in good condition that way) )
They have more complete sets but something like this is a good start.
http://www.whatsyourdeal.com/forums/...-tool-set.html