If booking out of DVC it's the $95 fee and possibly fees on the other end which might include a housekeeping fee if it's less than 7 nights as well as AC or utility fees. Many location also have a tax applicable to timeshares. One also move the points from DVC points to reservation points if one has to change or cancel.
If booking DVC through RCI, there's the exchange fee, normally about $209 to RCI plus the resort fee of $95 that used to be called a resort services fee. It's never been for transportation but it's basically used to pay for the exchange system. They'll tell you it's to cover Magical Express, dining reservations and the like. In reality it only covers things that members are paying for already so it's essentially a "because they can" fee. While I think the fee is petty and unreasonable, it's still cheaper than owning or renting directly so it's not that big of a deal. The good thing about DVC from an RCI exchanger standpoint is exchangers get essentially the same priority as owners for villa assignments and DVC consistently gives the unit view/type deposited which can be a win at places like BLT, BWV & AKV. Not that DVC is great with requests but they do OK.