I crossed back into the states at Roosville and it was a breeze. I entered at Baab which was a bit more complicated but that's because I was entering and not returning. Bonus about crossing at Roosville is that you get to drive through Montana along Lake Koocanusa and through the Yaak (NW Montana). I think timing wise it's about the same as heading through Eastport.
In terms of minimizing driving time, Eastport, ID might be your best bet. That border is also open 24 hours, but beware that it's currently under construction so it can be a bit slow at times.
That said, my crossing was hassle-free despite having two tubs of homemade brownies and 1000 glow sticks in the trunk of the car (which they definitely saw). The brownies were legit, but in hindsight, that was an extremely stupid idea so I'm glad they didn't hassle me.
I don't hate Canada. Some of my best friends are Canadian. That's not true actually.
I wasn't picking on Canada, I was just saying that sometimes there are threads about Canadian issues that I just cannot participate in, just like I don't participate in the girly thread. Doesn't mean I hate girls.
Misunderstanding, hugs and kisses - but word of advice, chip-on-my-shoulder Canadians are the only Canadians worth giving shit to anyway, so I wouldn't be too touchy.