Shower shoes Medication/advil etc Something to sleep in (shorts, tshirt)
Multi-tool, gloves, small flashlight
Any favorite/gotta haves like bandannas or support socks or insoles
Make sure your boots fit, breaking in new boots on a hitch is ill advised.
Goodwill/salvation army is a great place to find t-shirts and even Carhartts. If you do engine oil changes you will need a set of grubby duds (in my case, a boiler suit) that you can afford to toss when they get bad enough.