Wow, starting early, but bison jams can happen anytime. Yesterday Jim & Pat Dick and I had to attend training in Mammoth, we were on the road very early. No issues on either end of the trip with vehicles.
We heard from many areas of NPS, including Bison management, Wolf project, Bears etc. Plus a heads up on a busy summer. Very interesting day, although it was also pretty long.
My suggestion is to get into the park early. Not as many early morning bison jams. Nowhere near the number of cars. Enjoy your day and head back out by between3 and 4. Later in the day everyone else is on the way out. OR have dinner here and head out after 7PM.