We went in 2009 and 2011. Assuming things haven't changed too much...
Hoop-de-do-Review show is very much worth going to. Of course, pretty much all the Disney shows are worth seeing.
If they still have the carriage rides, they are a little pricey, but very cool to go on.
No need to rush out in the morning if you don't want to! Some people love the "rope drop", being at the main gates first thing, but most days we would show up an hour after opening to avoid the lines and walk right in. Transportation from the Fort to the main gate is by boat, which is just too cool.
Fort Wilderness is a pretty big campground, and a lot of people rent or bring golf carts. Renting a cart at the campground is a bit pricey, so we did it for just one day and had fun driving around in it. There are a few "cart roads" that sort of sneak through the campground.
Otherwise, transportation is not a problem. Bus stops are scattered through the campground, and the buses run constantly.
If you need or want anything... Ask! Disney people will help you out in remarkable ways. One thing that happened to us was that we were at the docks waiting for an orange bus (routes are color coded, the electronic signs on the front of the buses tell which color / route they are). It was taking a surprisingly long time, so I asked a different bus driver if he knew where the bus was. He looked surprised, said he didn't know, but (hitting a switch), he said "hop in! I am now an orange bus!".
Which campsite to stay in - they are all excellent, with mostly small variations. I do recommend a site (or "loop", I don't know if they allow individual site reservations yet or still just loop sections) near the middle camp store or near the docks.
Expensive? Yes. It one of, if not the, top campgrounds in the country, in the top vacation resort in the country (or world). Save money for the trip so you don't have be worrying about the cost while you are there.