We were there in August. You just contact the front desk and they will bring you more toilet paper, paper towels, dishwashing detergent, liquid dish cleaner, garbage bags, etc. They provide a few coffee filters- the big round kind, they also give you 1 crystal light to make lemonade, 1 popcorn, and a mini salt and pepper shaker. I brought my own laundry detergent and fabric softner although they provide you with one detergent. I also brought zip lock baggies and foil.
If you plan on making eggs you might want to bring a non stick pan.
They provide towels at the pool, we always went late, around 10:00pm and there were plenty of towels.
That's all I can think of for now.