I'm sure this has been answered somewhere, so if I can find this somewhere else, please direct me with a link 
My family of 4 (hubby, me, and 2 girls 9 and 6) are taking a Disney cruise from 5/12 to 5/16, and we'd like to stay for 2 nights afterwards on Disney property. We've always wanted to stay at Animal Kingdom Lodge and thought about staying there.
It seems it may be less expensive to rent from DVC (Studio Savannah room) than getting a room at the resort, but is there something I don't know? We'll be arriving early in the day from the ship. Would we be able to use the facilities (pool, etc) and store our luggage before the 4pm check-in time?
Are there benefits of staying at the resort that I wouldn't get by using DVC points?

My family of 4 (hubby, me, and 2 girls 9 and 6) are taking a Disney cruise from 5/12 to 5/16, and we'd like to stay for 2 nights afterwards on Disney property. We've always wanted to stay at Animal Kingdom Lodge and thought about staying there.
It seems it may be less expensive to rent from DVC (Studio Savannah room) than getting a room at the resort, but is there something I don't know? We'll be arriving early in the day from the ship. Would we be able to use the facilities (pool, etc) and store our luggage before the 4pm check-in time?
Are there benefits of staying at the resort that I wouldn't get by using DVC points?