We require that all floaters shower before entering the tank. Our showers are quite an experience, so this is more of a perk than a chore. We use organic shampoos, filtered water AND wash our towel with organic detergents. After your shower, you put on your ear plugs and enter your session.
No, your skin will not get pruned. Your skin will feel great after your float, thanks to the Epsom Salt (Magnesium and Sulfur). Sulfur in particular, plays an important role in the health of your skin and nails.
Our float rooms are very spacious, as far as float rooms go. They are 5'W x 8'L x 7'H (larger than many bathrooms). Besides that, while floating, you feel more like floating in outer space than in a room. Even extreme claustrophobics have reported no problems.