If you would like to thank them by phone or regular mail:
111 Red Banks Rd
Greenville, NC 27858
They also have an online email form at http://www.gandermountain.com/contact.shtml .
And it gets better!
FREE Meeting Room - Our Lodge is available to plan your group's hunting or fishing trip, or conduct your outdoor club/Scout meetings. Call or stop in for availability.
The Huntsville location has a meeting room that can be used for free for "outdoor clubs". I wonder if a group of OC-ers could meet there.