Yeeeeah. There is a Codex'd precedent for the difficulty of flying around in the transitory Mists. It's a hazardous region of space and it's got its share of both Navy presence and Pirates... and the Royal Navy presence there is due to the pirate issue, primarily. Interlopers would be pulled from Hyperspace, since the hyperroutes are mined with pulse mass generators, often, and this results in a first contact standoff scenario... with the Hapans having a home field advantage. A massive invasion fleet of the sort Palpatine could have fielded would not be as much of a threat as a whole as it conventionally would be thought of because the whole fleet couldn't get in there all at once. The mined, choked, and notoriously winding hyperroutes are pretty much a bottleneck. This is how, in canon, they maintained their independence and their isolation for so long. It would have been impossible were it not for the edgy astrophysics of the area they reside in.
if you wanna have a go at Hapes and friends, then understand that this will probably (and should) involve multiple skirmishes. I had the details of the region Codex'd to prevent arbitrary skipping past the hazards of the Transitory Mists and to prompt more interesting Fleet and fighter skirmish RP that might be a bit more gimmicky elsewhere in the Galaxy.
Now, As I understand it, unless I misread something, this is classed as a Rebellion, which makes much of the hostility internal. We'd need Hapan characters in on the conspiracy as hostiles, necessarily, unless all of the PC hostiles are foreign, in which case the above caveats apply. If it's mostly internal, then the Mists themselves aren't as much a factor unless there is fleet combat on the Hapan territorial rim, either foreign or domestic. On the ground, it'll get pretty interesting, albeit fairly straightforward in terms of content and expectations.
As for where the Queen stands in all this, Her player has been missing for a while and rarely comes on to play. I feel like I can't arbitrarily go over her head, either, being that she's an admin OOCly, and a semi PC authority figure ICly. So, how this pans out poltically would have to be established by Cira herself, providing we can get here here to participate as needed. ._.
Speaking for myself, however, I'm down for dogfighting (Relina's a Navy combat pilot) and assassination attempts (she's the Ducha of Gallinore and loyal to the Hapan Queen, and by extension, allies of Hapes, making her a prime target). Feel free to hit me up and work stuff out for or against me so we can make some smooth writing. c: