If they are all on the same reservation then you will only be able to apply one credit card to have charging provledges. However, if you tell them that you do not wish to have express check out, you can get a copy of the bil the night before you check out and figure out who owes what and they can take payment on multiple cards. Each ID card will have a number on it, the last two identifies whos card it is. When the bil prints the number prints with it, it is very easy.
The only thing is... you did not mention if you pre-paid for the room... if you did not, you will need to pay when you arrive. If this is the case you want to make sure you divide it up how you want to amongst everyone, or else one card is going to get charged with all the room and tax... again this is only if you are not on a package (or pre-paid).