You could use two sealed switches, one for each door. Check online for Omron, Marquardt, or other quality switch makers. The crap from Radio Shack won't last long. Make sure to use switches rated for the solenoid current.
You could also have a small on/off keyswitch mounted elsewhere for disabling the door locks. That way you wouldn't have to use key EVERY time to get in.
Also, the car audio/lock & alarm places have keyring fobs and receivers to drive door latch solenoids. They cost around $50-$150 depending on model and features.
I don't know if I'd put the hood latch in the cab. If the battery went dead, you'd have trouble getting in.
sounds fun!
Chip
