In general, you'll have one towel for each person based on the published maximum occupancy of the room. (It isn't based on the booking, but the room size.) For a two-bedroom, this would be either 8 or 9 towels, depending on whether there's a sleeper chair.
For the few resorts that have an extra bathroom in the layout (Kidani & BLT 1&2 bedrooms), I've heard that you get more towels than the occupancy limit because I think they put 4 sets in each bathroom. Someone else will need to confirm that.