Very interesting caves. Tours are certain times only and at certain times of the year so ensure you check on line for the tour time and date. Some folks have just "shown up" and there were no tours that day. It is worth the trip to see the cave. you can also hike a short distance to the Canadian Border. DO it.
If you own or manage Gardner Cave, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.