SO I leave our room (building??) and walk to SSB, where do I disrobe?? Where do I put my clothes on to go away from SSB?

Clearly, this is a newbee question. I have read about water shoes and hair care.....but not undressing

I usually pack a beach bag with tanning lotion, my favorite book a hat to cover my face from sun and some bug spray.

Ladies please give me some insight...