I've tried one of those stands with the two legs (a la motorbike style) under a full camping load and they're quite stable, but I didn't enjoy having to hike the load's weight up onto it!
I much prefer one of these:
(sorry for the rubbish hasty photo...)
It's effortless on use and very stable even with shedloads piled on the bike:
(Probably too much stuff!)
Stand's are great and underrated!