Hi Blake! Welcome to the Disney Parks Moms Panel!
Oh my goodness, your vacation is almost here! You are visiting the Walt Disney World Resort just in time to experience an
Incredible Summer and I'm happy to hear that you have plans to attend
Disney H2O Glow Nights with Partysaurus Rex.
I spoke with a Cast Member to verify that yes, you can use your "plus" admissions for the water parks this weekend, prior to beginning your stay at a
Disney Resort hotel on Monday. He informed me that you can activate your tickets up to 10 days prior to your check-in date and suggested visiting a Guest Relations location to activate your tickets prior to entering the water parks. There are Guest Relations locations outside of all four theme parks, both water parks and in Disney Springs.
As for
Disney H2O Glow Nights, that is a separately-ticketed event, so as long as you have purchased your tickets for that event, you are good to enter on the date of your tickets as early as 7:00 p.m. If you plan to enter
Disney's Typhoon Lagoon Water Park prior to 7:00 p.m. that day, you will need to use one of your "plus" admissions from your Walt Disney World Park Hopper Plus ticket.
I hope this information helps, Blake! Please let us know if you have any other questions!
Tabitha