I've thought about the "Nick crossing state lines with drugs" question a bit. We don't have evidence he went to Fargo (the most likely place across state lines to score) or anywhere else. His documented trips and socials were all Twin Cities. There's functionally no suburbs of the twin cities in Wisconsin.
Above said, I would almost guarantee that Nick took his tackle box of drugs to his road trips that he drove to. I can't remember if he drove to Vegas (think they flew), but I think they drove to Nashville (they saw Doug T on the way and went to some concert), and I don't remember on his terrible appearance in Philly on WATP.
We know there were a lot of people at the "Playboy" Airbnb - I think Branca was there for a bit, as was that remora fish douche Valhalla Awaits. From the little spoken about it, I believe there were more. If the feds really wanted to nail Nick- one of those retards, clout chasers, and/or hangers-on would totally flip state's evidence to save their own hide. If this case against Nick really was coming from the VERY TOP, there's no way Nick was clean in Nashville, and driving there means they were hauling drugs. (And probably a St Andrew's Cross and Lord knows what else.)
We saw the Nashville video, it was a disaster. That's a good 14-15 hour drive (even with the Highway of the Saints cutting it down a bit), versus a 2 hour flight. Yeah, he went to some concert with Doug on the way, so maybe that's the driving excuse. We know Nick was doing pole dancing for some of his friends leeches there. He 100% brought drugs across state lines to Nashville.