That is a good astart to see most at a leisurely pace with a down day in between. We start our vacations off at 8 but usually grow to 11 days. The down day is for the wife for shopping around the World. She gets the idea of what she wants and likes from all the parks and then in the middle of our stay we do the shopping day and make all our purchases and have them all shipped home. We do our lunch at DTD, Captain Jacks, go back in the evening and stroll around there and breaks up the vacation nicely. In an eight night stay you can see all the parks night time festivities without rushing or doing a commando trip. Even though we've been to WDW over 38 times, early days were of the 4-6 night trips, the 8-12 night trips are the best, we actually come home relaxed and not spent.