I have to question the "huge majority" of any group in this state.
OK, I'll clarify. They're the huge majority of the people who hold and use power. The power of the vote, and the power of elected office. But even leaving aside voter turnout numbers, I don't think one can appreciate the broad cultural (and, however incoherently, philosophical) disposition of the population in the power counties. It's overwhelmingly lib/dem/progressive-minded. I have the misfortune of living and working hip-deep in it, and I can tell you that the SJW-style, TDS-minded, "redneck"-hate runs deep and wide. They aren't just anti-gun in the normal sense. They think we're dangerous, mentally ill children. That's not hyperbole. They are so profoundly signed on to the Nanny State mentality that it is, I think, beyond any hope of repair at the voter level in those areas.
Their hatred for you is palpable, and they consider your instinct to rally the troops and get the corruption out of Annapolis to be - as we saw them saying just this past legislative season - the personification of terrorism. They actually mean stuff like that when they say it, and the local (and national) media repeats and reinforces it. Combine that with it being pounded in from day one in the public schools, and you have a baked-in, dyed-in-the-wool, irreversible world view that can only be checked (by the courts), but never actually fixed. People raised to think that hating you and everything you stand for is virtuous aren't going to change their minds and suddenly start embracing constitutionalism generally, let alone the 2A specifically. Like NY and CA, MD is too far gone. You might talk them into fixing outright corruption (say, Pugh), but you aren't going to change their moral compass.
Relief through the courts resulting in a more rational no-(or less)-infringement set of policies is possible. And if such a judicially-enforced posture can then be sustained for the better part of a generation in Maryland, the fact that it won't be the wild west with blood running in the streets will eventually normalize things a bit.
But the problem is that it's not about guns in the first place. This is about individualism vs. collectivism. And because the collectivists truly, deeply hate your individualist instincts on all subjects, they most vocally hate any particularly visible manifestations of it. Your desire to be able to defend yourself is the classic one. But the root cause of their hatred for you is your generally non-compliant attitude towards leftist culture in the first place. The gun-grabbing is a side show for that larger cancer, but they fight on that topic because it's easy to exploit, emotionally, with low-information, non-critical-thinking, emotionally enslaved voters (which brings us back to what happens in school). In the meantime, my resources go primarily to those who are fighting in court.