Is the Bianchi M-111 made for N-frame S&W's? If not, see if El Paso Saddlery can make one like it or try Lobo Leather.
If you use a good retention strap over the hammer, I seriously doubt that your strong trigger is going to get pulled by a vine or branch. You're not walking around with the hammer cocked, are you?
I like the old Safariland M-29, lined in green suede and basketweave stamped. No longer made, but the El Paso Model 2 is virtually identical. I own both. The holster is safe, I think. I wore one for years. But the Bianchi M-111 is more to your description and covers the gun well and can be used either strong side or crossdraw.
I have NEVER heard of a DA revolver trigger being pulled by foliage. Nor a DA auto trigger.
The late gun writer and LEO Alan "Skeeter" Skelton wore a Model 27 as his favorite handgun, and he was in New Mexico. Usually favored the basic Tom Threepersons holster with the trigger guard exposed above the leather. Strap over HAMMER, not over the trigger guard, as in some designs.
Even the old Lawrence No. 24 sits the gun deeply enough that I don't see how foliage would get hold of the trigger, let alone pull it.
Have you considered what the US Border Patrol wore for decades where you live? Worked for them! I prefer a higher riding holster, partly for sitting comfort. And it hides easier under a coat, if you have a CCW license. Undercoat carry is good in inclement weather.
Now, pay attention: I've read those Navaho Tribal Police novels by the late Tony Hillerman. If one of those skinwalker witches transforms himself into a vine in tight brush, he might be able to pull the DA trigger of a holstered M-27. Otherwise, I doubt that you'll have that problem.
Don't cheap out on buying a sturdy belt. It'll pay for itself in utility. And an old M-27 deserves really good leather.
www.epsaddlery.com