again - all i can compare to is modded computers and they don't move at 60+ miles an hour and get pummeled by suicidal bugs (usually)... but i do install stuff in the field that has to handle some extreme conditions... wiring and such that has to handle from 175 to -10 temps and some pretty high winds - and all the art cars and people that had el all over them seemed to do just fine last year at BM

there are nylon quick ties that have a hole in the top of them - you can put a metal screw thru that and secure it pretty well
www.homedepot.com/cmc_uploa...0427_3.jpg as an example - that should get you started...
you should be able to just glue it to the vehicle in some of the more windy areas with some elmer's (water soluble so beware of rain on the way but removable) or epoxy... or jb weld - or super glue... whatever you weapon of adhesive choice is (mine is rtv - silicon based - rain proof but removable with a bit of effort)

as for the el wire - it's pretty tough - i've seen plenty of modded puters get lan gamed a lot and even gigged - baring an accident or any cuts you should be fine as long as you don't leave enough slack for it flap violently in the wind - i would bring some spare lengths to fix any problems that may arise - but then there's always the store in gerlach, they have tons of el - in case of emergency just take the bus into town that day (like 20 bucks iirc)

or there's el tape (www.crazypc.com/products/PC8470.html) - sometimes more pricey but this comes with adhesive backing... same as el wire but thin as paper but not as bendable (iirc) -

in fact at that above website you can find an entire arsenal of 12 volt lighting... should be about ready to go with any 12volt system... ala car - might not be the best prices but will give you a good idea of where to look and what to look for... believe it or not you might get the best prices at online computer stores...

where in the east coast.... if you'r far enough north - i may be able to help with gas money if you stop by and grab me... LOL