I'll throw a plug in for a cordless tool set, you know, the 18 volt combo kits with a small saw, light, drill, sawzall, that type. Now with the Fathers Day sales, this is a good time for sure. That way without ac power you can still make modifications to your rig. Go online, search for HDepot or Lowes, type in your zip code for available stores, then type into their search box what you want. Shop till you drop...
It's a good time to purchase if you really need something though. I do agree that one thing you do need is a good combination of wrenches, sockets/drivers, and screwdrivers. $100 in tools vs. one shop labor (labour) hour at $100 from a stealership or garage... Even the simple all in one box 3/8 socket set with std and metric sockets, a few nut drivers, a few combo wrenches, pliers, wire cutter... Some of those are under $100, especially on sale.
I'll leave the tool accumulation to others, like my brother with the 3400 SF house and 3 car garage, who has nearly every tool known to man. I think it's like an addiction and as a vandweller, it's fruitless. The bulk, weight and the lack of working them (hey, that sounds like me!) isn't worth even a 50% bargain... I'm so over that lifestyle!
Dusty