I used to live on a lake that had a permanent population of 60-80 Canda geese. Those bad boys were afraid of nothing and would hiss at you just for lookin' at 'em the wrong way. There was only one thing they couldn't tolerate: a dog. I'd see a bunch of 'em take off in a hurry for what looked like no good reason, then a minute later here'd come a dog, trotting along, minding his own business.
Screw R/C planes. The best and probably cheapest way to get rid of geese is to get a Jack Russell terrier and let it start "herding" them. Two weeks, three tops, and those geese will be gone forever. He'll work for food and keep you warm at night.