My crew wants to drink after work

The officer is correct, it is illegal to be in the cab, and if you have it in/on your trailer, you will need a BOL for it, and permits to haul alcohol

 

If you were off duty, and using the truck for personal conveyance, alcohol is allowed to be transported in the cab. Here's the link:
http://www.fmcsa.dot.gov/regulations/title49/section/392.5?guidance

 

Isn't personal conveyance loophole governed by the company and its policies and not by the FMCSA?

 

Yes and no. If your a company driver or leased on they can write up anything they want in your contract and have you sign it so it's their rules. If you have your own authority you can do whatever you want on personal conveyance.

 

In my case getting the wine, I was bobtailing personal use. The original poster was most likely on duty what we call portal to portal. If you are on duty picking them up then it stands to reason you'd be on duty dropping them off. Getting beer in the interim would be against the regulations I say.

 

Guess the beer I had in El Paso at the Walmart parking lot makes me busted

 

Maybe re evaluating your alcohol intake is something you could do. It's a slippery slope if you don't keep it in check. Just because your peers drink doesn't mean you should.
Me personally I abhor beer I think it's gross- I get to the point with a shot of jack.

 

Sounds like you got some real winners with you.