From Jan until about the Thurs just before Memorial Day weekend, HH was available at 7 months out in 2016, except for time during the two Easter weeks which was mostly filled, and except that GV's were somethimes gone other times. Memorial Day weekend to about mid-June was spotty with rooms missing two to three days a week, except the dedicated 2BRs and the 1BRs were actually open June 1-9 if you booked on Nov 1 or 2, 2015, but by Nov 4 those were missing 3 nights between June 4 and 11. By mid-Nov, things started to get more difficult particularly for GVs, studios and 2BR lock-offs which were missing five or more days a week in last half of June. However, as luck would have it, both the dedicated 2BR and the 1BR were open for the week of June 18 to 25 (a Sat to Sat) at 7 months out, but by Nov 22, 6 of those nights were filled for both room sizes and by Nov 25, just about everything was gone through July 7 except for a random day or two and except for dedicated 2BRs which were missing only a few of those days. Once past July 7, it more or less became spotty again for the rest of July with rooms usually missing only a couple days a week at the start of any week except GVs more, and the 1BR sometimes had six straight days open, while the dedicated 2BR did have some openings for a week at a stretch.
On January 1, all rooms except GVs were still open for all of Aug 2016 at HH, and you could have gotten any room for a week 7 months out from Aug 1 or from Aug 2 (I suspect that might have something to do with the fact that massive amounts of spawning jellyfish usually show up right along the beaches at about that time of year). Thereafter, the rest of Aug was spotty with rooms tyically missing a couple days per week when checking 7 months out from the beginning of a week, except the dedicated 2BR was sometimes open for 7 nights in a row.