Does anyone know how busy opening day gets? I've never done an opening day before so I'm unsure wether to leave it for a few weeks after?
It can be anywhere between an off-peak to peak day (as in wait times), pay attention to the weather report as that strongly affects the number of visitors! Just expect around 45/60 minutes max for the main coasters, and then Smiler will average around 95 minutes, usually peaking at 130 mins at around 11.30am/12pm. My tip is too make use of ERT at Nemesis, do Galactica (once the park opens) then make your way across the park leaving The Smiler as your last ride, unless the wait significantly drops!! Have a great day!