as well as fortfiends, the best Disney info is
http://allears.net/
and their Fort Wilderness is at
http://allears.net/acc/faq_fw.htm
http://allears.net/acc/ResortMaps/fort-wilderness-map.pdf
The closest we've managed to the boats is 300 loop. 300 and 500 are right next to the dog park.
There are 2 stores -- one next to the boats and one halfway up at the Meadow (900, 1000 loop)
Transportation is accessible. It seems as if we sometimes spend ages as someone's wheels are taken in and strapped to the floor.
Read All Ears about ticket prices. It's complicated and they expire quickly! Last time we were there for a month and bought an annual pass as the cheapest option.