Eric, what you can do is take a fishing swivel, hook it to the eyelet of the decoy, attach line and a weight. Throw the weight into the tree, then pull up the decoy to the limb. The swivel will let the decoy rotate in the wind.
You can take a coat hanger and cut it to make what would be a 6/0 hook to put on a limb. You will have to gauge you hook sizes you the trees you are hunting under.