The vampires in our campground were pretty low-tech. They didn't even have cell phones. I liked the suggestion about cutting a hole in the ice but these were swamp vampires. They hung like a misma over the sawgrass in early evening impervious to the snapping of the alligators below. Every gentle breeze resulted in low moaning sounds that almost obliterated the noise from the neighbor's generator. Dog walking was out of the question so Phideaux had to do his business under the TT. Please send list of recommended modifications ASAP as we are leaving on Monday. lizzie