Hi there...
Many have answered your question already. My advice is to bring everything yourself. It's not a lot, and the shampoo/conditioner/bodywash that they provide...not that great. I would bring your own detergent. You should have enough towels and toilet paper. If you need more toilet paper, that's free, as are paper towels and dish detergent. Pool towels are provided at the pool. I usually recommend bringing a hair dryer. They have them, but, ya know. You can ask for additional blankets, pillows, hangers, and some other amenities at no charge. Just touch housekeeping on your in-room phone
Hmm...helpful stuff in general about BLT...
1. It sits slightly down from the Contemporary, so go up to floor 5 to get to floor four (main concourse) of the Contemporary. It's shorter to walk the breezeway than to go across via the first floor.
2. If you decide to swim (since it is August), you will have access to both pools, not just BLT's pool.
3. The food is best at Contempo Cafe. Worth the hike upstairs if you need quick service food.
4. I assume you're planning on cooking, but please go to breakfast one day at Kona (hop a monorail over to Polynesian). I promise you won't regret it!
5. The pool is less crowded in the morning than the afternoon.
6. If you don't want pool games, go in the morning
7. There is shuffleboard and bocce ball. You have to go to Community Hall to get what you need to play. The courts are located right outside the pool gates.
8. I could be wrong, but since you are not officially DVC members, you will not have access to the top of BLT. I believe that is reserved for owners at BLT staying there using their points. Like I said, I could be wrong, but don't get your hopes up.
9. You will get trash and towel service once while there. You will not get a full cleaning. Keep this in mind.
My family owns there. It's my favorite DVC at WDW.
Actually, I'll be over there about the same time you are.