There's a guy from Alabama that makes a stake that is movable via remote, it turns but doesnt walk. I saw it at the Perry Turkeyrama last year, believe it was something like $80, it looked like a cool concept but I wasn't paying that for it
I understand, if it had been half the price one of the guys I hunt with would've bought it. The only thing I've heard regarding this has been that turkeys don't like decoys on RC trucks (I've read this both here and elsewhere), but there has to be something that'll work
On a serious note, an old turkey hunter showed me this one. Let the breeze move your decoys. He put the dekes out and then stuck a couple of small sticks in the ground behind them so they would move with the wind but not spin all the way around. Haven't tried it, but sounds like it should work to create "some" movement.