install an inexpensiveish Hikvision camera

plug it into your power outlet (probably secure this in a steel box)

if you have line of site from the neighborhood entrance to your house or the community office then install a pair of these to create a wireless bridge (like an invisible ethernet line up to a half mile distance. you can now monitor the camera as often as you want from just entering its ip address. let me know if this is a route your interested in and I can provide more info if needed

Is there power in more than one location on the campground?

Could you use a set of Ubiquiti Nanostation M5 unit's for backhaul to a second site, then use Unifi Outdoor units for client access?

http://www.amazon.com/Ubiquiti-US-FCC-NSLOCOM5-NanoStation-loco/dp/B004EHSV4W

http://www.amazon.com/Ubiquiti-UniFI-Outdoor-Access-802-11b/dp/B0066DV06I

The Unifi will blow the doors off any netgear, so you might try it regardless. It has a software controlled notch filter that gives it unparalleled sensitivity to incoming signals, plus a low distortion, reasonably high powered output.