Interesting thread. I just purchased a DTOM (Don't Tread on Me) medium fanny pack for my S&W SD40VE. The bag is nicely finished in suede leather and has a strong clip that I adjusted to make sure it fits towards the front of the bag so I have control over it. The bag does not have additional clips to attach it to my belt.
This pistol fits the fanny pack exactly; if it were slightly longer or taller, the large bag would have been in order.The gun slips into an elastic band which seems to hold the weapon securely.
The gun is easy to deploy through a pull tab system that when tugged forcibly opens the zipper. One caveat: I did call customer service about the stickiness of the zipper. DTOM's response was to practice with the zipper and that it would free up and slide easily with a little use. This seems to be the case.
Yes, a fanny pack is nerdy, and may scream "look, he's got a gun," but I've gotten past that. Concealed means out of normal view and this fanny pack does it well and comfortably. I don't think the average guy on the street really thinks about who is, and who is not, carrying. And, it's simple to unclip it and leave the whole thing unlocked in my vehicle if I gotta go in a "gun free" business...
For walks with the dog, hiking, and being in the outdoors while wearing shorts and a tee, I think this fanny bag is a good choice for me.