I guess we've been lucky all these years. I've been going to Laramie since 91 and have never had a problem till last weekend. Will definitely be watching things more closely and might even put out some "bait" to see who bites.
Radio Shack said they have a wireless motion detector called the Reporter or Wireless Alert for $79. They said it has 1200' range from detector to base and positioned properly false alarms could be minimized. May have to look into one of these units.
An inexpensive, wireless baby monitor works well too! No false alarms either.