The LPI has explicitly stated they look the other way (literally) when passing the Texas tradelane. You don't see policemen in military bases, or in a military base like the one at Groom Lake. The system is also not used for minerals, but for secret research and military operations.
Bounty Hunters should not have access to Zone 21. Not even the majority of the Navy and LSF do, according to the SP campaign. Even if your character had the codes, he'd be shot to pieces by the Navy and LSF patrols in the area, the experimental systems, and goodness-knows what else before you could as much pass Juneau.
The sheer power of the forces within Alaska would make any attacks through or to Alaska suicidal and ridiculous, equivalent to the Mafia attacking a military base or, as Unseelie once said, someone trying to smuggle cocaine through A51.
The Outcasts? They wouldn't want to go near the Order's territory, a Corsair ally and killer of the "Great Spirits" that guard their ships, or the Corsairs territory for that matter. They also have absolutely no reason to go there, as they can strike at Liberty far more safely and effectively using their puppets in the Rogues and Hackers. They also have far safer smuggling routes, and where would they even get the codes to the gate?