John glad the tote is working out for you.
To keep your tanks warm you have a bunch of options.
The easiest (and what I do), is run one tank at a time. If it starts slowing down in the cold, simply point your generator exhaust/back vent right on the tank.
It might sound sketchy, but trust me it doesn’t even get the tank “hot”, or even “warm” for that matter. But it’s enough heat to let you run the tank bone dry in brutal temps.
Another option is to buy a medical heat pad (like for a sore knee). They’re like $10-20. Tape it, strap it, velcro it, or however you’d like to the side of one tank. You can get a second one or move the one you have if your regulator freezes up.
Drilling with the shack up is the way to go when the ice gets thicker. Some shacks “move” when you lower them, so just pay attention if you have to drill the holes forward a bit (towards the truck), or backward a bit (towards the back of the shack).
Hole sleeves are an absolute must for me, as are Katz covers.
Some guys use wheel barrow innertubes as hole sleeves, but I’d rather not deal with pumping them up and storage.
Bank your shack good, and kick the snow down a little to compact it if it’s super fluffy.
Don’t bother with blocking your shack up unless you are flooding or plan on leaving it unheated and unattended on the ice.
If you’re in it and have the heat on, blocking is a waste of time and makes it harder to bank.
There’s a thousand little tips and tricks, but those are just a couple bigger ones that help.