Everything has settled so here's an update if anyone was curious:
I got the new job, has been great. Is my 2nd trucking job, my first besides my starting job at a mega. Making over double what I was, and doing practically the same work, quite amazing.
They actually ran another background check during orientation, but it didn't come up. I'm assuming what happened is that since this was pending as well as a summary offense, not a misdemeanor, it slipped through. I think this combination was key, though it's possible it was just policy that only misdemeanors and felonies were disqualifying or looked for.
Though I did research that once I was charged it certainly would show up in a background check as a criminal conviction. I hired a lawyer and while the case wasn't dropped, it was changed to a summary disorderly conduct for 'hazardous or physically offensive actions' which I'm dramatically more comfortable with because of the lack of connection to alcohol if employers ever see it.
If it ever comes up I'm thinking I'll just say I was throwing firecrackers or I fart-bombed a park while on vacation with some friends lol. It's very ambiguous with the whole 'physically offensive actions' thing.
I'm confident I've established some responsibility with alcohol, having not binged whatsoever, and not having any unless I'm home with days off. It is horrifying to contemplate that I could've been arrested for dui if the cops were merely having a bad day with how it all played out, considering I had open containers in the cab. A somber reminder that I'm sure will stay with me.
I sincerely appreciate the advice and criticisms y'all offered. Thanks.