I'm planning my first 3 day trip for Memorial Day weekend. As always, I check all my equipment about a week before. Kind of gets me wound up!
I found something in my bag I took on last year's ride (Lewis and Clark Trail) across Missouri. A voltage line tester. It's the little thing that costs about $1 that you plug into an outlet to see if there is power. The one I have only has a small light if the outlet is powered.
I brought it because I like to ride at night and I always take my headlight battery charger with me. I also take my cell phone and charger if I plan to be away for more than 3 days.
I found several parks that have outlets for lamps, radios, etc that are still powered. My headlight battery charger only draws about 1/2 amp and I can get some charge while I fix lunch or dinner. For a small thing, it came in real handy.