We were in Aqutica from 12 to just before 6pm.No problem getting everything in,but it was not crowded.
To me it would depend on if I had passes and how often I could get back.We live a couple hours away,can get over some and have passes,so doing this seems reasonable.If I had to pay full day price,parking and all,I might not want to rush.
At least if you do,it's easy to get to.Drive right into it just about.
rich