I'm currently poking around for my next trip in mid-April to early May. The weekend of Apr 17th and Apr 24th are both pretty reasonable. But the May 1st weekend is through the roof. (Like $450/night on Fri and Sat for a Grand King at MGM). I checked the convention schedule--and nothing really significant. No college sports. NBA Finals are still a month away (ish). Google doesn't really show me much of note. I've no "need" to go that weekend, so it's really irrelevant. But I just found it interesting without any obvious driver of demand....but I could easily be overlooking something obvious.