We will be spending 4+ days in Las Vegas next week and we've considered Luxor for accomodation. Not because it's the best place in town but because the pyramid shape is something different from the rest.

There's availability in the rooms but the reservation system doesn't allow arrival on saturday, 17th december. If I book a from 16th december until 21th, pay for the 16th but arrive on the 17th, is this going to be a problem?

I believe some other hotels in Las Vegas also have this "prior day arrival requred" policy on saturdays.