We bring a cooler with drinks, sandwiches and some snacks so we don't waste time in line purchasing and then eating our lunch, we just eat it quickly on the beach chairs.
There are a few places to eat, and I'd say average for Disney CS.
You should also bring water shoes (aquasocks). They may look a little dorky, but this way you don't have to worry about getting your feet burnt (or stepping on a rock), and you can wear them in the pool and on the rides (on Summit Plummit they make you take them off and hold them while you go down the slide, but no problem having them with you).
Blizzard Beach does not have much shade, so be careful about sunscreening every few hours.
Do they have towels there? We don't have to bring them, right? If they do have them there, do you have to wait in a line and sign them out, or do they just have them in a pile for you to grab?
So, it's okay to take a cooler into BB? I was wondering this. I hate the food there and always end up eating a kids meal. But if we can take a small cooler, that would be great.