We went for 10 days in January and felt too rushed. One day was a full travel day and one day was a half travel day and on the half travel day we kept looking at our watches, worried about leaving the park on time. We'd like to do 12 days next time with the travel days being only that, allowing for 10 days in the parks with a possible rest day in the middle. Money-wise, it makes the most sense for us to do a longer trip every 2 or 3 years than a shorter one more often given that a 10 day ticket is the same price as a 6 day one (or something like that) and that we fly from NY state. If we lived within driving distance I imagine we'd try and go every year for a short trip, but the cost and hassle of flying with so many little kids makes the longer trip better for us. We felt like we really got to settle in too. Our 10 day trip was great, but I think 12 days would be ideal for us.