Looking at the PRICELINE EXPRESS Deals, it appears you have 3 different strip properties that can work. 3 star SW $74, 3.5 SW $87, and 3.5 Center East $95. I would guess they are Excalibur, Luxor and Ballys. Depending on which star category and location you liked best, bidding would use different strategies. Afterall you don't want to end up with Circus Circus , Stratosphere, Palace Station etc... with poor choice of rebid zones. The simplest least expensive would be start at $65 3 star SW, if denied add Central East, then Central west as rebid zones maybe 68, then 71? Similar strategy if going after 3.5 SW with 78 and 82?. Going after the 3.5 Center East leaves you with just Center West as a rebid zone $85 then 88?
If you want to be near your friends, try for Excal and Ballys. Luxor looks close but its a pain to get to MGM quickly. Excal might be the quickest, but if you are Ballys, then you are closer to the center which is where most want to hang out
edit- If you bid on PRICELINE, it doesn't mean you will get one of the PRICELINE EXPRESS deal hotels.