The best way I have found to stay level is to park level.
To do this: Start off by getting perfectly level without levelers and with the TC still on the truck, like in a parking lot. Check for level in the TC using a small level(I like the idea of making sure the stove is level) which you will use in the cab. Then find a place in the cab that gives you the same reading you got in the TC.
Now every time you park, put your little level in the spot you found(or made) in the cab. This way when you're parking you can reference the level in real time and you're doing most of the leveling work before you're even parked.
I use a leveling app on my phone and set it on the console in the truck. Works like a champ.
OR! you can go super complicated and put a level on the stove and then put a camera on the level and a monitor in the cab. ;)
