The U.S. Census Bureau provides some data (2001) to quantify hunting and fishing pressure in various states. The numbers for Arkansas are
here; Florida numbers are
here (PDF format; see page 11 in both cases).
For Arkansas, the listed annual numbers are 430,000 hunters and over 8.4 million hunter-days (and another 13 million fisher-days).
The annual numbers for Florida include 226,000 hunters, and about 4.7 million hunter-days.
This all adds up to a whole lot of people spending a whole lot of time in the field (maybe tens of millions of hours annually in each state). Obviously, not all that time is spent in the "right" habitat; however, any way you slice it, the sheer magnitude of those numbers is absolutely staggering.
If you desperately want to believe that the Ivory-bill lives, it's tempting to dismiss all those hunters and fisherman as
Cletus, The Slack-Jawed Yokel. In reality, though, a sizable percentage of hunters and fisherman possess birding skills as good or better than those of Sparling, Kulivan, Harrison, Fishcrow, etc.
Could a population of large, noisy, conspicuous birds have escaped confirmed detection by all those people for over 60 years? I think the probability is essentially zero. This will become even more clear by this spring, when none of this season's organized searches results in the confirmed detection of any Ivory-bills.
A personal note: As a hunter and fisherman myself, I've spent a considerable amount of time far off-road. Specifically, over the years I've been out hunting white-tailed deer in Wisconsin, elk in Idaho, and Dall sheep and caribou in Alaska. I've also been fishing in other remote regions in Minnesota, Canada, and Alaska. In all of these "remote" places, I've found one constant: human sign in the form of tracks, evidence of old campfires, small bits of fishing gear, etc.