Thanks everyone for the replies. I checked out Booking.com and it's pretty helpful. Had no idea about that website.

An additional wrinkle in this is I'm trying to use Hilton points to book. I also have SPG and Marriott points, but would rather use Hilton as my family also holds Hilton points.

I suppose I should just hop on the phone with those three companies and see if they have ways to book award tickets for 4 persons per room. 8 per room would be fantastic, but that's probably just a pipe-dream.