Will 20 mos. old be to young for Yellowstone?

My arguement is not that you should not take a child that young to Yellowstone but that there are many other places to go that would be less of a challenge to keep a toddler safe. I don't think I would take a toddler to the Grand Canyon either. We did not sit home with our children as we traveled with them from the time the oldest was about 18 months old, but took them places they could have some freedom and we had peace of mind. Perhaps living on the east coast gave us more "safe" places to visit as we often headed to New England for our summer vacations.

I just know I was much more comfortable taking our children to Yellowstone and the Grand Canyon when they were older and we enjoyed horseback rides and mule rides together.