Good grief, Girl... you do have the wildlife problems. I'll be real interested to hear how this one turns out. Meanwhile, even if it isn't raining, I'd be carrying an umbrella. Adequately wielded and opened quickly to scare them ought to definitely help. Worse comes to worse, just bash one or two with it! (Though be careful, these critters are apparently protected by Federal law! see this website:
The Geese are back on Campus!)
I've been mobbed by geese but never felt truly threatened so I can't speak from experience except that loud noises and looking big always seem to make them more wary.
A capgun might do the trick, too, or some of those Fireworks "Pops" that explode when you throw them on the sidewalk. We have an "AirZooka" purchased from the Edmund Scientific catalog which makes a creepy noise and also sends out a large puff of air which I would try if this were happening to me. It definitely alarms the dogs, the horse and annoying squirrels. It's a little difficult to get on target, but once you've got it aimed properly... well, it makes every animal I know try to find someplace else to be. It doesn't hurt them, but they just find the invisible puff of air disconcerting -- sort of like you've reached over and patted 'em.
Here's a photo -- the thing costs about $15.
I see that Edmund Scientific now has a mega-zooka for an additional ten dollars that looks even more effective:
Quote: From the makers of the original AirZooka, the all new MegaZooka! The newest "fun gun" that blows a harmless mega-ball of air towards any object or person!
The MegaZooka is SUPER-SIZED and can be used in two ways: the all new single air blast trigger action which allows you to cock your MegaZooka in position while waiting for the air assault to begin or the semi-automatic pull power action! Either way, it really blows 'em away!
Good luck. Let us know how it goes next week.