Shelby, if I were you I would get to the port around noon. There are model ships by every elevator the will show were everything is. I never have seen a tour of the ships I've been on.
Tours aren't given to anyone unless it's a 5 or more night cruise. A bridge and behind the scenes tour is a special privilege. I get to do them because I'm a diamond plus member with over 24 cruises. It don't hurt to ask an officer of the ship if you can get on one of the tours, but don't be disappointed if you can't.
Towels are provided. There will be towels in your room or handed to you when leaving the ship. They also will have some on the island.
Your cabin steward will arrange your bedding for you every night. Just let him know what you want and he or she will oblige you.
If you would like to see pictures of our Sovereign cruise click HERE
then click on "SOVEREIGN OF THE SEAS"