Just so you know, you can request additional towels at any time, by calling the front desk. You can also just grab what you need (towels, sheets, etc) from a maid cart. We usually just grab a bunch off the cart and store in our room. You would just place your dirty towels, outside your door in the morning, as you are leaving. The maid will pass by and just grab them.
If you have dirty\wet sheets you can get clean sheets. You would just make the bed! Dirty sheets, get placed outside same as towels.
You would also just empty the diaper pail, daily or as you see fit, placing it outside or in a trash can. Just request more trash bags.
Believe me, I know it's not for everybody, but no matter what you can get anything you need from coffee replenished to trash bags.