Here's a link to JJ's most recent brief trip report.
http://disboards.com/showthread.php?s=&threadid=179545
I've been to DVC @ Hilton Head a couple of times and it is a WONDERFUL resort. IMHO it is a more "stand alone" resort than Vero , in that you could go to HH for a whole holiday and find plenty to do. While I LOVE Vero as an add on beach part to a WDW vacation I think it is a slightly limited for a 2 week destination in it's own right.
If I was to use HH as a destination within a WDW holiday I would probably leave Disney late on a Friday ( having checked out of WDW BEFORE the expensive weekend) and drive for 3-4 hours before finding a cheap motel for the night. For the Saturday it's worth checking the price of a cash booking. At that time of year there is a good chance you'll get a really good deal and save your points for Sunday to Thursday stays. Alternately, if I thought I had plenty of days in the parks/WDW I would look at staying in Savannah for a couple of days, it's only an hour and a half before you get to HH and has some wonderful history attatched to it. Depends how you're fixed for points if you need to be economical with em.
HH is a great resort, the DVC is well placed in the centre of the Island ( it's fairly small so no where is far from anywhere). It has a great pool in the area where all the accomodation is and the Beach House is a great facility. It's a couple of minutes in a car, 10 minutes on a bike and 20-25 if you walk it from the main buildings. The beach itself is wide, doesn't get too deep too quickly ( a critisism at Vero) and you can walk for miles along the shore. They offer some very interesting and fun activities, We had great fun on a sunset dolphin cruise where you go out in a small speedboat and look for dolphins in the sound, my DD Caroline and DGF Jana had a great afternoon on a pony trail ride along the beach. HH has some fantastic golf courses, there is a big outlet Mall on the Island and both Savannah and Charlston are within a couple of hours drive and both are steeped in history.
There are also a lot of nice restaurants on HH but DEFINATELY the best eating experience was " a Private Affair" cooked by Chef Gordon on DVC property. When we experienced this it was done in one of the 3 bedroom villas on property, which was a nice way to have a look round the largest DVC units. Now as they have been taken into "inventory" and used for guests it's held at the beachhouse, but I think that would be a just as nice venue.