You cant hack oatmeal, then have pancakes. These stay in my gut for a fair while on a cold winter hike, and I do that quite frequently. Only one Ptarmagan today while bird hunting. Basicly have a gut sticker breakfast then bring a couple of substantial sandwiches and kit for a hot drink to go with them (or thermos of tea,coffee). Pour boiling water in your thermos and let it sit for 10 minutes, then pour it out and add your hot drink. Preheating a thermos gives you longer heat retention for your fluid. You will probably be tired and half frozen by lunch. Its easier to just heat a hot drink and slam down the sandwhiches. Wear layered clothing with thin wind pants between the layers, with a sandwiched wool shirt or sweater up top. You will be warmer in bush and trees than out in the open. Anti-fog for your glasses if you wear them, is a damn handy item at minus 30-40. When the snow is crunchy (ULTRA COLD) make sure that you have minimum exposed skin on your face. After about 15-20 minutes I can tell if Ill be ok or not. If I am still warm I continue my hunt, If Im getting cold on in my extremities and it wont go away (after 15-20), I will head back and dress warmer or stay home. I stay tuned to what my body is telling me and dont push it.