You fly into the airport and get your luggage. Then you go through customs and go to the place where the hail cabs for you. When the guy getting cabs asks you where you’re going you say “bonnarro” and he’ll say “you want to buy some weed?”
You then say “yes” whereupon he’ll instruct you to place twenty dollars on top of a phone box and grab the bag inside.
It’s sketchy as heck but it’s worked 100% of the times I’ve flown into Nashville so you’re welcome.