I have seen guys take a small dead tree and tie it up with ropes in 3 directions .
I have 2 10' peices of 3/4 pvc conduit with a 20' rope between them with 2 15' tie down ropes at each end
take it out to where you wand to hunt lay 1 conduit down strech out the 20' rope to the 2 conduit ,atach the decoys to the rope ,drive in a stake for the 2 tie down ropes 5' apart atach tie ropes and stand that conduit up ( helps to have help) stand up the other conduit to pull the 20' rope with decoys up and stake down the tie ropes
this gives you a 10' high 20'or 30' closeline with decoys on it . Doves will land with the decoys if you are not watching .GOOD HUNTING