The 23rd is Saturday, probably will be packed in the afternoon. I'd suggest walking around the hotel and going to city walk for happy hour at 4pm, then going to a restaurant at 5pm for an early dinner.
Oh, and before you even arrive, tell the driver to stop at the Publix just north of the park, so you can stock up on supplies. Most limo services will do that as a perk.
You'll be at the park Sunday thru Tuesday, so there is no problem, you'll see everything easily. You can even take the shuttle over the SWF one day if you like or visit WnW.