Judy,
I use a 1/2" 18 volt cordless drill with the biggest hex wrench that will fit in the stabilizer holes. I would think a 12 volt drill would also work. The higher the voltage the more torque the drill should achieve. I simply angle the hex wrench into the hole, and then raise or lower the 4 stabilizers. With a freshly charged battery, I have no trouble cranking up/down. If the battery is running low on power, I might have to switch to a freshly charged battery. If all else fails you still have the manual crank (that I've used a few times). Don't lose this manual crank
I usually level front to back using the tongue jack, then side to side. I installed a few inexpensive 'spirit' levels on the TM to let me know when I was level. You need to have the trailer reasonably level for your own comfort, and especially if you run the refrigerator on propane.
Nick