We were at HHI the week after Easter this year, but it was 2 or 3 weeks later. The week after Easter we reserved at 7 months without problem, but the week before Easter we waitlisted for. That (the week before Easter) was the week of the Heritage golf classic and I think the Heritage is the week after Easter in 2012 (not sure). If so, you MAY have to waitlist. Come to think of it, we were looking for a studio-if you want a 2 BR, you may be OK.
Weatherwise, like I said, Easter was a few weeks later, so I'm not sure of the weather when you go. But the pools are heated, the hot tub was really warm, and the air temp was in the 80s