The cost, atleast back in July when we used it, was $219 for up to 5 people, Atleast one must be over 18 or 21. It is for the duration ofyour stay. You sign up the first day you are there. This entitles you, and the others on the contract, the use of the watermice, pantoon boats and regular bikes. You can take the boats out whenever they are available, and for the length of time at which they are not needed for other people. Our girls had the boats out for 3-4 hours in the afternoon in July. We were there for 10 days and there was only once or twice where they had to come back in and get a new slip. Other times the CM just waved them on. My hubby and I took out the pontoon boat a couple of times with friends that came to visit. The kids went on the watermice and we took a relaxing trip on the pontoon. It was great. There is no other way to go and the CM's at WL were great. Let's just say by the end of the 10 days our troop of 4 16 year old girls were known by all of the water patrols between WL and all of the channels. They have memories though, that they will never forget it. Now it's do the boats and forget the parks!!! I will get them to WDW one way or another. Enjoy it. BTW we were staying at BCV and you have to hand in atleast one room key when you take the boats out.