Online Check-In when rooms are blocked?

[Mason7AK]

We had to cancel our April trip because my daughter was trached in late March, but have rescheduled for June 7 - 13th. I am wondering if anyone has used online check-in that had a room blocked for them through special reservations? I don't want to mess up our blocked room by doing an online check-in! I did call special reservations a few days ago and confirmed they have an accessible room with roll-in shower at POR blocked for us.
Thanks in advance!
Angela