Hilton.com has better rates than the actual hotel website for a stay next week. Hotel website (and their res dept.) is offering $55 whereas it is $49 on hilton.com - there is a deal for $44/nt avail from LV Hilton web or res dept but is for 2 nights minimum - but does include show tickets.

So I save $6+tax, get online res bonus - and should not have a problem double dipping!