No advice, but we are staying here in Sept 2017 for the first time. We rented a golf cart (they take reservations 365 days in advance, so I would call now and get a reservation and then decide later if you want to cancel), and are on a waitlist for the 6 person cart. We figure with 5 kids from 1-7 it will make life easier (only getting one cart, considering calling to see if we can get a second. But if we can't the other family who is vacationing with us will have to walk ;P ).
In the past we have visited the resort to do the wagon ride and HDDR. I love the atmosphere here, so I'm excited to stay for a couple days before we move to our DVC room. We are just packing nonperishable food in our luggage for this portion of the trip, and will shop at the fort store for anything else we need. Once we transfer we will have Garden Grover deliver the rest of the groceries.
They have trail rides, which I would love to do, but all of my kids are too young. Also the bike rentals - but again I don't know if that is something worth doing with my crew. I have fond memories of when I was about 8 riding bikes around the Fort with my family. Can't wait til my kids are older so we can all do it.