I was able to book a 2BR at HH for March 21-28 (Easter weekend and the week following) at the 7 month mark. I did call day by day to make sure I got it. Note, HH has mostly 2BRs so the answer you get regarding availability could depend on the size of unit you're requesting.
Personally, I thought it was a bargain.....only 206 points for a 2BR for the whole week during a holiday week. And, it's within driving distance from Ohio, so we can avoid the inflated airline rates during the holiday period and won't have to rent a car.
I'm setting low expectations with the rest of the family regarding weather.....highs in the 50s are o.k. with me......50s after a long winter feels pretty darn warm.....plenty nice enough for biking, hiking, mini golf, etc. Highly likely it will be warmer there than in Ohio the last weekend in March!
I'd love to hear what others who have been there during that time of the year have to say about activities!