What did y'all forget?
Wasp spray
BFH (big hammer)
Get some penetrating oil, such as PBBlaster
Brake fluid so you can find the leaks
Water for you and the truck
Handyman's secret weapon (duct tape)
Bandaids
Rags
If you're wife's going, take some earplugs for her, you might not want her to hear your profanity
And since you're in west Texas
Snake bite kit
And for after you're through working a six pack of something cold, wet and frosty.