I'm making a guess here, but I think member activities include the cost of providing the weight room, boat docks/rental, Kids activities, free video rental, pool towels, surry (sp?) bikes and stuff.
Management fees, I think, partly, would include reveiw and design of annual
points charts (since they change a little with the holidays every year), and to pay the salaries of management (like the Disney VP in charge of
DVC, member accounting salaries, etc.
There may also be income listed for these items to offset some of the loss for Member Activities, I don't have my budget handy.
Rather than over analyze the budget, you couldjust compare what a 2 bedroom would cost in actual point costs + dues, compared to 2 deluxe rooms. That shoudl give you an approximation...plus remember that a 2 bedroom unit is MUCH, MUCH nicer than 2 delux rooms. And if you're inclined to actually use the kitchen, figure in the saving in self prepared food vs WDW restaurant food.