If you're really stuck on what to do with the extra days you'll be spending in Vegas, write John and ask him about details on the free day-trips to Laughlin which include a free buffet.
Now days there really isn't much there for silver strikers but for those who have never been there, it's kinda' nice. The 1 1/2 hour ride to and fro would be great for war stories especially if it could be arranged for the whole group to be on one bus.
Some of the casinos even have seating areas along side the river.