I'm using Miralax right now and have a scope tomorrow as well. I was told to start taking Miralax on Tuesday so I wouldn't have to take so much today, which is fine b/c it hasn't taken affect until today.
I hope your scope goes well!
I vote against Miralax and gaterade - never drink gaterade again!!
Over the years I have prepped only 4 times - not sure what two were but I never threw anything up. With Miralax I got 1/2 way and threw it up. Did not get much more down. YUCK!
You need the electolytes in Gatorade - that is why it is prescribed that way. I was told Powerade is ok and better. OR pick a flavor or gatorade you never want to drink again.