Evidently the "problem" is partaking of drugs while also having guns on hand.
Guns on hunting trip? No problem.
Drugs on hunting trip? No problem . . . provided you don't get caught and all.
Drugs AND guns on hunting trip? Well, now we have a problem. Evidently, while it's illegal to have drugs in the room while you're getting high, it's even MOAR ILLEGALLER to have guns in the room WITH the drugs while you're getting high.
And, of course, if one of you dies while having both drugs and guns in the room, then you get double secret probation.