It's not easy to get at HH but possible at 7 months. I have HH points but didn't have enough for last summer so had to book some nights at 7 months. I had to waitlist one night. It came through about 30 days out, but I had also booked a cash room as a backup as the night I needed was a Tuesday right in the middle of my week.
Vero I haven't ever tried booking with 7 month points.