So we can't buy tickets in advance online?? What time do they close on Saturday and sunday/memorial day weekend?

Yes you can Claudia Costa that's how we purchased ours. And we was there til 11pm as well.

You can look on line but on Saturday we were there until 11

Not sure since it is a holiday but usually they don't open until 4 or 5 and closer around 11

I tried but didn't find where to...where did you get yrs? Thank you