I always thought the bandersnatchii didn't 'exist' very long at all (From infection to violent death, or starvation). When they got infected it was a very very short count down to termination. As pointed out there's just not enough 'food' for them. When you look at their size, that compounds the problem. They're not house cats. It's going to take ALOT of meat to feed those things. And once Sasquatches start showing up, ripped apart and mostly eaten the 'suspect list' is going to be VERY VERY Short. The 'infection' of sasquatch into Bandersnatchii is likely a food source that got away/survived before said psycho big foot was slain, either by it's own people (Where in infection could happen again) Or those turning out for the bounty.
As for the clothing to hide.. ehhhhh. I'm not really buying that one for the Wendigo. If you're 8 to 9 feet tall you're going to stand out no matter what you wear, and unless you're covered head to toe in a bio suit, the white fur is going to stand out even more, along with their faces, claws and fangs. The more you cover up, the more you LOOK like you're trying to cover up. Add in that that fur is going to make clothing look funny (( Like putting a sweater on a dog with lots of fur. lol)). Both draw attention. If you're all decked out in pants, shoes, (Do Wendigo get feet claws as well as hand claws?)) A shirt, jacket or cloak, and hat or hood. You're going to look like..... a wendigo trying to hide that he's a Wendigo.
Even at distance people will think you're some type of troll trying to hide his identity, which raises the very scary question of "Why is that 8 to 9 foot metahuman trying to cover up? And do I want to be around him?"
And before anyone says 'Just shave it" these things are 8 to 9 feet tall. That's ALOT of fur, and it's going to grow back, probably PDQ. And while you're shaved you're going to look even worse. Like a long haired cat that's shaved. lol. Which will in and of itself draw attention.
Lots of interesting thoughts here though.