If you are still freezing, no matter how cold the water is, you can be warm. If you are wearing "long johns" and sweat pants, and the long johns you speak of are the typical wal-mart, fruit of the loom cotton thermals, then that is your problem. Cotton does not insulate when wet, by sweat or water. I've had my hip waders swamped, and I'll be wearing blue jeans and fleece wader pants under them, and I'll have my jeans soaked, but after a little bit, my fleece is either dry, or is wet, but warm, either way, it still insulates. Fleece is fast drying, unlike cotton. If you haven't tried it, I strongly reccomend spending 35 bucks and getting you a pair of basic fleece wader pants, and you will not regret it, mine have lasted three seasons. And the good thing is, you don't sweat in them, they are excellent at wicking moisture away and transferring it. You will NEVER find me hunting ANYTHING without my fleece pants on. In dove season I wear them, because it keeps me from sweating like a dog. I took the liner out of my Columbia Omni-Tech and replaced it with a Fleece Jacket that had the zippers to convert it into a liner jacket. I've worn it in 65 degree temps and it's always comfortable. Under that on the cold days, I wear a fleece vest. The key to real warmth is in your feet though. Stop double and triple layering your gold toe tube socks, and spend a little money and buy you some real nice cabelas outfitter series socks. I bought the heaviest socks I could find, they were about 8 mm thick. They are Merino Wool, with spandex so they don't slide down, under those, I have a basic over the calf poly propylene liner. This is the same situation, from dove, to duck, to deer, to the spring snow goose season, to turkey, you'll always find me wearing this combo of socks. I even wear them when I'm running the Well routes. I usually secure the fit with a pair of neoprene ankle garters. You will thank yourself for buying this stuff next season when you are comfortable enough to be out there all day long. Because I always am.