We go there all the time.
It's a great little museum because it's child sized - you can get around the whole thing before their attention span wanes lol.
They will offer you a sheet to fill out as you go in - they have to answer questions about what dinosaurs eat and find different dinosaurs etc. My experience is that when you get the sheet they focus on the sheet and answering the questions rather than looking at everything so do one lap then get the sheet and do a second lap.
If you take a few spare dollars you can buy a dinosaur tooth or similar in the gift shop.

If you were going to do an overnighter I would say do the dinosaur museum one day and questacon on the other day.