Given the population densities which the Sasquatch researchers are hypothesizing, there are probably no more than 3-4 dozen Sasquatch in Oklahoma. They aren't talking about thousands of Sasquatch in Oklahoma. IIRC, the Sasquatch researchers hypothesize a total population of less than 10,000 spread from Alaska to Florida with the bulk of the population in British Columbia and the Pacific Northwest states.
Three or four dozen Sasquatch probably wouldn't require more food resources than a couple of hundred more feral hogs. Lord knows Oklahoma already has enough feral hogs and I think most people would agree that the resources are there to unfortunately support even more.
“Given the population densities which the Sasquatch researchers are hypothesizing, there are probably no more than 3-4 dozen Sasquatch in Oklahoma.”
Not unless they all have cloaks of invisibility.
They would have been discovered by now.