suggestion for any hotels ? cheap hotel ... range 90-110$ a night? at waterton area...?
you might get a campground for that price - hope you have a tent.
The Flamingo motel or Outpost motel in Cardston is in your budget.
When are you planning to travel?
Check out Groupon right now, good deal.
Check hotels in Mountain View and Cardston, also Pinch Creek. I've listed them in order of proximity to Waterton.