Alas got first two nights at OF and last two at canyon.

Great!!!
It only took a couple of days.

So what does your lodging look like now?

It might be time to start making a list a things to do now that you've got lodging done (I hope).

Who will be on the trip as of now, how active and what are the interests?

After GTNP, we will drive stopping along the way to OF Inn. Will see OF area that night.

Next day Geyser basins, and we have dinner reservations at OF Inn.

Next day, go towards Canyon Lodge. This is the part I still need to figure out. Will go thru all the advice above and put it together. SO after 2 nights, then will drive out West Yellowstone going via Idaho Falls to SLC. What time should I leave YNP? Keeping in mind we have to make stops every 2 hrs for my inlaws and we will make the stop at Idaho Potato Museum just for fun!

I would definitely drive a couple of miles up the road from OF to see Grand Prismatic Spring and its colors. If you'd like you can drive a mile back towards OF and park in the Fairy Falls lot. Then hike a mile towards GPS.

When you see GPS on your right look for a path trail up the hill for a great view of GPS.

Also, walk thru the Upper Basin at a few different time. Looks very different in morning and early evening.

Not all geysers are like OF and errupt every 90 minutes. Also, at the far end near Riverside Geyser is Morning Glory. Beautiful colrs.

It's a 6 hour drive. So if you leave noon you should be fine.

I would get up early that day and fill in whatever you haven't done. An early morning drive to Hayden Valley that's only a few minutes from Canyon is a good chance to see wildlife. There are always bison and early you may see some deer.

You can also go to some of the canyon viewpoints.

thank you Myer!