Alice is just fine for packing your stuff, but not for hiking around all day in. Most guys around here have what looks like an "h type" harness with a fire shelter and 32oz canteens along with a butt pack. That is there 2nd line, I guess it is a lot like military now that I think of it. Alice for 3rd line, your resupply, clothes wise I mean. More then likely there will be some sort of rehab unit assigined to the fire where you can get food and other things, don't worry about that. My captain uses a harness type with a camelback on back. I am not red card so we just fight the wildland for the first day or so while the USDF gets there guys moved around. When I go to a wildland I use either my bunker pants, very hot, or just the wildland pants and shirt, with the water bottle in the leg pocket.