“Take what you can't buy when you need it…leave the rest.” – uncledon1)
The most commonly mentioned items for a build are a cordless drill and saw of some kind. Akrvbob recommends an 18v Ryobi kit for value.2)
Corded tools can be used with an inverter. A PSW version may help keep motor temperatures down and help with picky battery chargers.
Circular saws, sometimes called Skilsaws, are used for cutting lumber. Jigsaws are used for finer work. When using a jigsaw gsfish reminds us to tape the bottom so we do not scratch the camper's finish.3)
Zipties, measuring tape, gloves, ear protection, eye protection
The owner should:
The owner may want to pack:
As you climb all over the camper during the build take note of all the fasteners you see: screws, bolts, allen head, square head, torx, etc.4)
spare tire, jack, lugwrench
fuses, connectors, wire stripper, distilled water for watering batteries, multimeter, extension cord for shore power
Not only can your air up a tire or inflate other items, but having a compressor lets you lower your tire air pressure to increase traction and get you out of sand or mud.
SternWake, jimindenver, and akrvbob recommend the Q Industries MV50 compressor.5)6) It appears to be marketed now as the Master Flow MF-1050 Tire Inflator.
StarEcho recommends the Kobalt 120v/12v compressor.7)
DannyB1954 recommends the Ryobi 18-Volt ONE+ Power Inflator.8)