Another option , check out "gardens alive" on line for their anti deer spray, works pretty well . Also check out the local dog groomer and get some dog hair to put on and around the trees/ plants deer don't like this.
The blow gun works , its quiet, very accurate with just a little practice and fun. I used one years ago the chase strays out of the yard . this used the old bead and wire darts and you just put 'em in the tube backward (bead first) and they really sting....
Or how about wax bullets in your favorite revolver?
Just get a half a dozen or so pieces of brass, open the primer hole just a little with a drill bit, paint 'em a bright color with spray paint so they never get mixed in with regular brass again. Then place a primer in the normal manor, take the case and like a cookie cutter push it through a cake of parafin wax to make a wad cutter
(no powder needed) you now have an accurate low noise, low power load that will be harmless but packs a good sting out to 10 yards or so..... these are fun practice loads for the "Parlor" too.
BTW I like the trip wire to the coyote howl, , ,