Pleasure Beach will indeed be open (weather permitting) on 17th Feb. The Wow weekends are only £10 if you book your wristband online and £15 if you pay on the doors.
Due to a bit of refurbishment you might find that some of the big rides wont be open but most of them will.
Pretty much everything else will be open in the town during those weekends though as they usually attract a decent crowd.
I dont think the trams will be running that far up there, but Im sure one of the many helpful locals on here could answer that.
You'll have a ball, that much I can guarantee !