I would say, when I went to Miribilandia in Italy with the ECC for Katun, there couldn't have been more than 200 people in the park and about 50 of them were ECC members, the whole day was like one big Ride session. And the weird thing is, the park is big, nice, full of good rides and it was a scorching hot day!!!
Two years ago I went to Cedar Point in September and drove through a horrible thunderstorm on the way there. It cleared up by the time we got there and there was no wait for any of the rides. Once we got there we decided to go on every adult ride in the park. This was easily accomplished as well as watching a horrible 1 hour imax movie.
Ironicely, the longest wait we had was for the Mine Ride.
These are some pretty nice stats for one day in the park. Its too bad that MF was not built.
12x-Magnum 10x-Raptor,Gemini 4x-Mean Streak,Mantis,Power Tower 2x-Every other coaster except Woodstock's Express which we decided to squeeze ourselves into only once. (no Jr. Gemini either...they wouldn't let us on, otherwise we would have)
SFA - Hurricane Dennis. I can't begin to guess the dozens of rides I got on each coaster. We must have spent an hour on Roar without moving seats. Sure it rained occasionally, but it would always stop for an hour or 2. We got more riding in that you could proabaly do during a week in the summer.
SFA can be strange like that. Somedays it's pretty packed, and other days it's refreshingly empty. Opening day in the morning this year was one of those days. The rain was coming down hard and it was cold for this time of year. At one point it was me and one other enthusiast in the station house for Superman. It was so bizzare. We actually got an unofficial ERT on Superman for the last half-an-hour. The waterpark also greatly helps in reducing traffic in the main park on some days.
At PKI in the beginning of August, we were there just before they opened the gates, and there couldn't have been more than 150 people there. I was so psyched that there weren't many people there. It wasn't even a bad looking day out. But once it got later in the day, the crowds started to roll in.