I've been to Vegas many times over the years and every trip has been planned well in advance. Anywhere from 3-6 months. Last weekend we were looking to go somewhere next week and weren't even considering Vegas, we were just there for a week in June But a $69 (Frontier, hate them but great price) airfare to Vegas combined with free return trip on Southwest (points for me, voucher from delayed flight for my girlfriend, combined with some comp hotel rooms and we're doing it. We're actually splitting up the trip, starting out with a couple of nights in Vegas, then heading down to Sedona and the GC for a few days, then ending in Vegas for a couple more nights. It was 115 when we were there in June and it looks like it will be cooler next week (108) lol. I know many of you have done impromptu trips and while I always enjoy the planning, the anticipation, the booking/rebooking hotels looking for a better deal, it's kind of cool to just book and then go a week later. The only downside is the rental car rate is quite a bit higher than we usually pay.