My 17mth old DS will be having 1 of these in a couple of weeks & I'm just wondering how your child coped?

We have to keep him up to 10pm the night before, & wake him up at 4am & then keep him awake until his appointment at 10am

I honestly don't know how we're going to do this, especially the car trip.

Just wondering if anyone has any hints or tips to make it easier?