I asked a similar question re: tenting in May, and so far the consensus is that it will be warm, but a good fan to ventilate - especially after the sun goes down and air cools off - should do the trick. You should do as well at the end of April. The only time I've been told it may get uncomfy is if you're there for the "3pm daily thunder showers" and have to close up the tent, it can get real muggy.