Congratulations, Steph.
We were walking our back pasture (just before sunset) a couple of weeks back, and saw a heard of about 18. All sizes. We had no camera, so just watched for a while. I thought I'd try something. (I'll digress a moment: We have a guy in the area who hunts with dogs, so there may be some conditioning regarding the rest of my story.) I start baying like a pack of dogs (quite convincingly, I think). Mrs Jazz thinks I've gone loco, but you should have seen those hogs take off! I'd stop my barking, and they'd stop running. (Yes, country entertainment at its finest.)
I guess my point is, if you just want the hogs chased out of the campground, I'm for hire.