We are a family of five and have no major problems.
My wife and I use the two cabinets in the living room on either side of the trundle bed. Our 8 year old uses the cabinet under the TV in the living room. My other two daughters use the drawers in the bedroom and my mother uses the closet in the bedroom. We then store the empty bags under the beds in the bedroom or the closet in the hall. Yes you have more room at home but it can be done.
Remember you dont have to over pack...The wilderness pool, which you would be close to has laundry machines and I know there are many others scattered about the campground in comfort stations.
Last year we had to get a handicap cabin because of my mother, and although it didn't increase the storage space Im refering to, it did give us more space in the bathroom and overall more walking around room. So in essence you have more room to leave things out; like a suitcase if you wanted to live out of that.
The only time we felt tight or cramped was if we all tried to have a meal at the same time ie:dinner. The table is small so somebody usually had to eat at the couch but no biggy either thats only an arms length away from the table.
I have not stayed anywhere else so I cannot comment on others accomodations
but we have stayed there for years and will continue to do so.
Keep in mind also, Im the only male in my party of five, so if it was gonna be small or tight I would be the first to know!
As for Golf carts they are a somewhat of a luxury and not necessary. It all depends on your parties needs and wants.
They cut down on your wait time for buses for activities or if you need to go to the store. However they are expensive if rented within the campground. There is the option of renting a golf cart from an off property vendor which from what I understand is cheaper, but we have never done that so someone else would have to comment or provide the info.
There is adequate parking depending on the time of your visit (peek time is more congested).
The only time restrictions on parking is at the outposts and I believe that is 15-20mins, which is more than adequate
If you decide to walk, from the furthest most cabin to the Meadows Trading Post(which is the closest of the two) is propably 20+mins, Wilderness Pool no more than 10, Meadows Pool 25mins, Settlement Trading Post, Marina and Trails End Resteraunt 35mins, these are ball park figures and your fitness, for the last three I would suggest waiting for the bus, it would be quicker