Around here we have Choctaw Indian Nation Tribe....
They have A LOT of truck stops/convenience stores/casinos, and every one I've been to has huge truck parking lots and $5.00 showers.
If I were closer, I'd tell you to park beside my shop. But I'm 7 hours & 37 minutes from Nashville.
Check to see what your local Indian tribes operate, they might be able to hook a guy up!
Leeching electric might be a different story though
I once complained I had no shoes....
Until I met a man with no feet