The oasis is a very nice CG. lovely entrance, 60/night for pull through parking back in 2007 likely more now
Main street casino may still have a much more reasonable lot, Call and ask for hotel reservations
Circus Circus CG is now a KOA also expensive, and it's a paved lot, Not the greatest but it's close to everything I was able to WALK to Ceasar's palace from there. Many of the other Casino's (Sam's, Arizona Charlie's and so on) have CG's as well. but they are a long way off from L.V. Bvld. and C-P.
I'm not sure what else is there without checking.
NOTE: If your daughter would like a flutist at her wedding and/or reception..... I can forwared her E-dress to one who lives in Las Vegas and works as a dealer in Paradise. That is basically just across the street (las Vegas Bvld) from Ceasar's palace (Actually it is across both L.V.Bvld and the cross street)
Thanks John....I'm not sure what their plans are for the music but I will pass along this information!