We did our tour on our last day. Started at Hollywood Studios around noon. We arrived at open, and did Mickeys Runaway Railway, Star Tours, The Frozen show, browsed a couple of shops, and had a snack, bathroom break and then met our guide,
Did the rides in Galaxy's Edge, took some cool photos, Did Toy Story area rides, Slinky Dog 2x back to back!, runaway railway again, then had a quick meal, while the guide and I talked about what else we wanted to do that day; some people only snack, but while we didn't do hour long huge meal, I needed a short break. My young gd didn't want to to TOT or Rocin Rollercoaster, so we moved on. When we went the Indiana Jones show and Fantasmic weren't running, so that wasn't in the plan, but I would have hopped over on a different day than tour for those anyway.
We decided to finish up our day doing things at MK, that were favorites or we didn't do on our MK time, but when my granddaughter expressed disappointment that test track had been down, we had a new plan.
Our guide drove us from HS to Epcot, parked in a back stage area near test track, we popped in and rode, then we went to MK for the rest of the day with rides ending with fireworks arriving at the reserved area about 8 minutes before they started. It's only sit on the grass, not chairs, we lots of space and a great view!
What my feet appreciated most at the end of the day, was the ride home! When the fireworks ended, we were whisked out of a close side door, walked only a few steps to her waiting car, and were driven back to the Dolphin, arriving probably before most of the people made it to their resort bus!
Our guide was great! She provided some waters along the way, and much needed tech help with mobile order, etc. Her name was Stephanie.
It was nice to do on the last day, it enabled us to do things we missed or loved, or might have been busy or down. The ability of the guide to park in different backstage areas, to maybe just do a couple of rides in another park was nice, as well as the ability of the guide to communicate with other guides about lines, crowds, etc was helpful to make the most of your day. And the best routes to avoid backtracking to conserve steps!
Make a list of your must dos, and they will do their best to make it happen. You can always adjust on the fly.