We are planning on being at MK long before it opens and going directly to the Seven Dwarfs Mine Train. I've heard of other rides opening before official park opening. Does the Mine Train open exactly at 9:00, or is there a chance it could open earlier? How quickly does the wait time increase? Would 9:15-9:30 already see 60 minute wait times? I want to find out whether it is worth rushing my family to the ride first thing or whether we should get a FP+, which I'd rather save for something else. Thanks!