First Greyhound bus travel. Looking for advice.

Howdy fellow travelers, I am preparing to embark on my first greyhound bus venture from Spearfish, SD to Denver. CO.

I have 2 stops, one in Billings Montana for 4 hrs (midnight to about 4am) and another in Cheyenne Wyoming for 2 hours (2pm to 4pm) then arriving in Denver at 6pm.

I'm looking for any and all advice. I'm a well traveled person, but I usually travel on a plane or in my own vehicle.

I guess, what would you wish you knew traveling by bus the first time. Like, should I bring a blanket? I have my Nintendo switch, a book and my sketch pad since I anticipate some boring times. Anything I should keep extra concern about on my way? Etc.

thanks in advance!