We were there at the same time this year for the 1/2 Marathon. We arrived on the Monday and left the following Monday. Tues, Wed, Thurs, were quite light and we accomplished alot (arrived early morning and took a afternoon break and back to the parks around 5 each day) but by Friday it had gotten considerably busy compared to the beginning of the week but not unbearable. We've gone at other times of the year (May, June, July) and found the last week of August to be much lighter. I think the longest we waited was 20-25 mins and that was for CarsLand. DH said that for future visits, he'd pick the same time as alot of the rides had short waits with some walk on.