Some storage lockers don't mind if you work in them. Rather then a large chain, try to find a smaller, privately owned storage place and rent a small locker, no bigger than you think you'll need.
The place where I rent a locker, here in New Hampshire, has no electricity but I have a small 1200 watt generator that gives me pretty much as much energy as I need. I just put it by the fence at the edge of the dirt lot and run a 100' extension cord to my locker.
The only stipulation from the folks who own the place was that I don't get oil or gas on the concrete floor so I generally have two large plastic tarps down on the floor, (wall to wall tarp!)
A litter box with kitty litter or sand in it is helpful if I'm doing something where I think I might expect some oil drips.
Best of all, if you move, you don't have to move the shop.
Current Ride: 2005 Kawasaki Vulcan 750
4th Ride: 1981 Kz1000 LTD (2008 - Storage)
3rd Ride: Wife (1999 - 2005)
2nd Ride: 1982 Kz1000 LTD (1983 - 2004)
1st Ride: 1977 Yamaha SX-650 (1981 - 1983)
