My husband and I are in our mid 50's - early 60's and live near Port Canaveral so we like to take advantage of Royal Caribbean's sailings from our port. Usually we travel in May or November so being on a ship with over 1000 children was a little different for us. We reminded ourselves that WE were the different ones and to be patient during the trip as we occasionally entered elevators with the buttons for all the decks already illuminated even though no one else was riding. LOL. For the most part the kids were well behaved. How lucky they are! I was 50 before I had the opportunity to cruise.
A little about Port Canaveral: worth it to park offsite at Beach Line Transportation. Check Groupon or Deal Chicken for great prices. They begin transporting guests to the port around 10 or 10:30 so get there early if you can. You can usually board around 11 - 11:30, get some lunch, enjoy the pool deck then go to your stateroom by 1:30. If you are at the port in the morning, boarding is very quick and smooth.
I heard people complain about the elevators on Freedom being slow. Elevator traffic is very predictable: day one and two take the stairs if you can because no one else is. By the end of the 2nd day people are beginning to discover the stairs and the elevators become more available. More people take the elevators on formal evenings as well but mostly early.
Our favorite decks are 9 and 7 as you have staterooms above and below and an easy walk to deck 11 or 5 for dining. A Jr. suite on deck nine is a good choice.
If you ever really tire of being around so many people, pay extra for something and you'll be practically alone. We learned that one on Oasis. Dinner at Chops and Portofino is worth the small extra cost.
Freedom has something for everyone. Large enough to have plenty of venues and small enough that you can be anywhere on ship in five minutes. We're now diamond members and will be back in December!