You have a number of choices--Lake Buena Vista, Palm, Magnolia, Osprey Ridge and Eagle Pines. Someone posted there would be a number of closings during May (maintenance, aeriation etc.) You can rent clubs--Calaways, $45 plus tax for steel shaft, $60 plus tax for graphite; obviously much cheaper to bring your own.
Golf Digest just recently listed WDW as the 34th best golf resort in the US (which is high considering competition). Particularly pointed out was Osprey Ridge. It is by far the best course there--most memorable holes and two of the best finishing holes you will ever see; it is actually closer to BW than Lake Buena Vista. It is also the most expensive followed by Eagle Pines, Magnolia, and Palm and Lake Buena Vista which are the cheapest. If you are a Disney Club or National Car Emerald Club member you can get 20% off the round cost. As to the DVC discount mentioned above, don't bother doing that unless you are going to play multiple times. You have to buy a golf card, about $91 with tax, that is good for year and then you use that card to get the discount; as a result you need to play a number of times to make up for the cost of the card.