@Bob--yeah, 2 ounces seemed like a lot to me, that's the official windscreen, however. It looks like something very simple, but all the cautions about cannisters overheating with windscreens have me a little spooked. I *like* my alcohol stove, because I am rather a pyrophobe, and something about gas stoves freaks me out. At least with my little alcohol stove it has a very finite amount of fuel, and I've never been worried about it's safety--how the heck people dump them and start wildfires is beyond me. Maybe they don't take care for site selection and cleaning burnables away or something. So, a piece of heavy duty foil--just poke holes for the pot supports and the burner, and sort of cup the foil around the pot?
@Jake--it does sound like a lot, I think I have the 1.3 L pot now that I think of it. For breakfast we need 24 ounces for coffee and tea, and another 8-12 ounces for breakfast. Anything left over is used for washing spoons, brushing teeth, and maybe another cup of coffee for my fella, he sometimes likes 2 cups in the morning. Dinner needs 24 ounces for dinner, and I usually have another cup of tea in the evening, so that's 36 ounces.
Both Casey and Roger seem to be saying the same thing, about 1 ounce (28 g) per day for 2. So, it sounds like if I go this route I can plan on a 4 ounce cannister lasting for 2 week-end trips, but maybe 2 cannisters for my longer trip. it seems better to me to pack 2 smaller cannisters than 1 large one--easier to spread the bulk around, that way each of us can carry some. I'll need to buy the stove, then play with it before I can figure efficiency.
Thanks, folks, that gives me some idea what to expect. I won't be able to go out on any trips before my vacation, so I'll have limited time to experiment.