If you attempted the same trip today, you would be driving slowly due to snow. How much longer would this trip be today than it would have been during yesterday's fine weather?
You did not state where all the locations were situated. Generally, driving from Greeley, Colorado to Casper involves traveling northwest into Wyoming. It includes miles and miles in Wyoming. Depending upon where each location was, you might have have traveled a distance across the state on I-80 or on other roads.
So laugh at this Wyomingite if you wish. I learned my lesson about crazy MS road trips. I no longer attempt these trips because I work at other jobs and never have enough time for contingencies and sleep. Contingencies and lack of sleep have made some work days so long they were like weeks! For now, I am catching up from years of road trip contingencies and lack of sleep.
You go get that MS money! I am going to take a nap now because my early work lasted from ~ 3 AM until ~ 9 AM. If there is extra work tomorrow morning , that will be my day all over again... and I will (might?) find time to do a little bit of neglected work at home....
Nature does not hurry, yet everything is accomplished. - Lao-Tzu