Good idea, Justin, except it hasn't worked for the past 70 years or so. Why should we expect it to work now? As long as the media has the power to propagandize the masses and the government has the power to withhold their "entitlements" the sheeple will continue to go with the flow.
Sure, gun owners make up a huge block of voters, but they don't vote as a block. If a group like us can't even get to gether on such a basic issue as the right to keep and bear assault weapons, what makes you or anyone else think they'll contribute to organizations? Especially since -until recently- the NRA (the biggest of the lot) was still pussy-footing around the assault-weapon issue. I go to their site and read all about marksmanship, safety, trap shooting and donating money, but find very little about repealing NFA '34 or GCA '68. Why? Well, maybe because they need those laws to loom over their members like goblins, allowing them to milk even more money. Don't get me wrong, (well, not too far wrong,) I'm a member of the NRA too and I realize they do some things well, but they're much too elitist, in my thinking, to properly represent me or many other shooters.
No Justin, we're locked into a death-spiral now. Like old, arthritic men remembering their youth, it will only continue to get worse. Sure, we may see one onerous law go away once in awhile, but it will be replaced with another, worse one. In time, the only guns left in civilian hands will make their owners outlaws, like those criminals who failed to register their guns with the local police in France and Belgium in the late 1930s. It made them criminals in the eyes of the government then, but when the Nazis marched in and demanded the lists of gunowners from those local police, they weren't listed and later became heros for having the means of resistance.
It has happened countless times before throughout history and it will happen again. You and I won't see it, but our progeny will. It is up to us to educate our kids so they will also educate theirs. Donating money to organizations will only make it easier to join gun clubs and have access to decent ranges.