Bass Pro Shop it is an awesome place to be
4-5 hours if you stop for lunch in the middle and hit the gift shop at the end.
We were there for just over 5hrs & moving at fairly fast pace, so I say at least that if not more time to really take it in. It's definitely a full day experience.
We spent about two and a half hours in both sides, five hours total. To really enjoy the displays and animals, you need to take your time or you will miss some of the enjoyment. My recommendation is to do one then take a rest break and then do the other.
4 hours properly
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