Hopefully you will do more than just one day.
The shows seem to be set-up so that you exit one show and only have 2 minutes to the start of the next show you want to see (which oddly enough, is on the other side of the park).
So relax, take your time.
At the end of the day, the Makahiki Luau is worth paying extra.
http://www.seaworld.com/sitepage.aspx?PageID=594