Crayfish are quite common at/near my camp in PA, in the pond and stream just a few feet from the tent and fire pit, but they're hard to find when it comes to ones big enough to make a half-decent meal. The funny thing is, the environment looks perfect for crayfish of all sizes. On the other hand, I get bluegill fish that look much bigger than normal, and make for quite nice meals (plus they're super easy to catch, whereas the big bass in the pond are hard to catch). I'm guessing there are crayfish here in Southern WV, but I haven't seen them yet. One of these days I'll try your lantern trick at either or both places.
The battery lantern (fluorescent) takes 2 6-volt block batteries, or 8 D-cell batteries in the block converters. That lantern isn't very bright, and for some reason, doesn't last long. Add that to the insane price of those batteries, and it makes for a good dust-collector in the attic. The only thing good about it is that it's omnidirectional, cool (unlike fuel lanterns), and doesn't put out toxic fumes, meaning it works inside the tent better than a flashlight. These days I don't use it much though; I just run a garage trouble light with a cfl bulb hanging from the top of the tent inside, with an extension cord running out to the truck. That setup can run all night without really doing much to the pickup's battery, which recharges the next time I drive it. You need to remember to unplug it if someone wants to drive to a restroom in the middle of the night though. I almost forgot that one night and nearly tore the tent down.
Here's the battery lantern, a pic from a long time ago (both pets there are dead now). That's an old canvas Coleman tent (8x12 I think) from 1968 - parents got it then; tent also dead now as of around 2002.
This is the newer 7x14x6 tent; I think I bought it in '04. I had a little Eureka tent between the two big Coleman tents, but Eureka tents can't stand up to the sun's UV rays for very long - they start to get brittle and rip just by touching them the wrong way, so I went back to Coleman. I'll hopefully be back to that camp by early to mid June.