I'm going on both days. I was going to go on saturday with my cousin, but thats opening day for his baseball team. I have to go with him on sunday, but i cant wait one more day so i'm going on both and taking off that monday. Everytime i have gone on opening day, it hasn't been busy. In the morning, i rode NITRO 5 times in a row. If nobody is in line in your row, you can stay on. i wonder why it's never crazy busy? Weather? Maybe not many people realize its open? Either way, i think spring is the best time to go if you want to avoid crowds.