I just did this. PG&E power company is now "voluntarily" shutting off power possibly for days during storms-- meaning you might need some serious generator capacity.
I lifted/skidded/slid two 100lb (empty) containers into my dump trailer. With them empty, I could drag/lift them onto the trailer. I transported them upright and strapped one to each front corner of the trailer. Fortunately the guy at the filling station agreed to fill them in place (on the trailer) even though he said he was not supposed to do that.
Getting home, the thought of lifting/skidding those two full tanks off the back of the trailer to unload them was a concern. I hooked a chain through the upper "collar" of the tank, picked it up with the front end loader off the back of the tank, and drove it over to the generator. Worked great
Liquid Propane Transportation Service. My small tractor didn't have enough height to do this but my bigger tractor did.
Having done this, I look back at the guy agreeing to fill them in the trailer. Had he not agreed to that, it would have been difficult to get them back in the trailer by hand, as the dump trailer has a high deck. Would probably have had to skid them into the trailer sideways, then grab one end and tip it up once it was inside the trailer.