Q.Any suggestions to raise containers up off the deck?
I don’t want to set the pots on the deck, but I don’t want to have to buy a bunch of those little wheeled supports!

How about a trip to your local garden center?
There are several options to lift your pots up from sitting directly on the deck.
Pot feet come in several materials from clay to plastics. I also just saw a plastic mesh that comes in squares that you set under each pot.
It allows drainage and a space between pot and the ground surface.
You also can tip clay pots up side down and place a pot on top, acting like a pedestal!