This topic of wild collecting has arisen in several times and places.
Always, it comes down to a judgement call, as to what constitutes a legitimate collection. In this case, as I understand it, the species is quite rare. This alone is BIG reason numero uno to leave it alone, completely. Plants with very narrow geographic range are usually sensitive populations to begin with: something is happening with them - they are growing or they are diminishing. In either case, it is a narrow limit. I am willing to bet a local authority there will support this view.
It would be good for a sample to reach the TC facilities of the ABG, but in this case I feel the collection should be under the guidance of a responsible botanist who has studied the species in habitat there. If that person concurrs that it is advisable to take a live plant or seed collection, then all that remains is to secure the legal permissions and arrange for the best transport. You will need to do some research and much advance planning!
If you don't take this route, then you are just going out to smuggle an endangered plant, hoping it makes it so maybe you can grow it. Definitely "not cool", even with the best of intentions. Also, to the best of my knowledge the ABG does not solicit or accept illicit material lacking documentation, so the TC thing is out unless you can provide such assurances.
Sometimes, as in the case of the Crestview site collection, there really IS an emergency. This *appears* to be an emergency, just as the red flava reported theft *appeared* to be, at least, initially. But, in the latter case, it turned out not to be an emergency at all just an error in reporting that got blown out of proportion, and it was VERY good that no one ran out there to "save" those poor last plants! We need confirmation of these reports before immediately spring into action, even when it is inconvenient to one's vacation plans. In all cases of wild plants, I prefer to know the collection has had some supervision by qualified authorities, although at the same time I have to conceed that most of what I grow probably was not collected with these mentioned protocols. We all have the sin. We accept the plants even if we know their origin was less than legitimate, and I hope it is out of love and not greed.
I think for this example: a natural event affecting a local population that there is no impetus for an emergency collection, but a local botanical authority may well disagree with me, and favor your idea. I encourage you to seek him out.
If this is a cloud orchid type plant, it will prove very difficult to grow without adequate conditions. Still, if you are willing to go through the steps: contact and enlist the assistance of a qualified researcher, and obtain the legal permissions, undertake the expense - then I think you too, as well as the ABG should have a crack at growing the plant. If nothing else, your failure will provide useful data, and you might surprise everyone and have it grow like a weed, and teach the ABG a thing or two! Those seeds and plants you produce will be wonderful gifts to the community, and I compliment you on your interest in bringing them to us in a reasoned and responsible way.
Good luck!