I was stuck on Snoqualmie Pass (I-90 Washington State) last year for 6 hours. Only had 3 potential problems:
1) had to pick the right time to get out and take a leak so the traffic wouldn’t creep forward.
2) I left without filling up with fuel because the pass report was fine, and I knew I could get to the gas station in Cle Elum with a quarter tank to spare.
3) Cell phone battery was draining from streaming videos on my phone.
#3 no cell phone charger cord in your car?