Head over to dis boards and check out their camping forum. There are just pages and pages of information about getting around by bus, driving to the parks yourself, getting around inside the campground.
A lot of it depends on what site you booked, what your plan is for the stay, and what your style of camping/theme parks are.
If you have a pet with you, make sure you tell them you need a pet loop. Otherwise I have yet to find a site I did not like at Disney, though depending on your rig and which site level you booked some are just impossible to get larger rigs into and might require a phone call or trip back to the check in settlement to correct.