Depends on the bag. I have many and use many regularly.
Most common type are the bags I keep in my vehicles. Those I keep freeze dried, enough for an overnight, and jerky for a quick snack. With this stuff its what keeps best in a car in all sorts of conditions, freezing to super hot.
My main bugout bag, now that's also my hiking bag, its about all of the above you guys mention other than the life raft stuff. I have it. I just don't have it in my bag. Mostly its freeze dried but I always have at least one MRE entree with heater for that cold rainy day all you want to do is get out of the wet and eat something hot. I also like fruit, either those individual aluminum pop top cans or MRE side. When I know I'm going to use the bag, I throw in cereal bars.
One bag, I call my day bag. Its a shoulder bag with gun and ammo, all sorts of "Oh crap," things to spend the night, but food I limit to only jerky or Slim Jims. This bag I use when I'm doing a day thing in the boonies.
All my bags even the day bag has some sort of water filtration. I keep water bottles in my vehicles and my hike bag I actually carry water.
Average bag weight is under 12 lbs, less than my business pack really. My BOB/Hike pack is 35lbs winter weight. My work pack is 25 lbs and that I carry literally all over the world so kind of is my guide to keep my pack weights close to that. Took a long time to get that BOB/Hike pack down the weight because it includes tent, bag, pad, cooking, etc. Its shaving ounces, literally, which is why the freeze dried is so good an option especially where water shouldn't be an issue.
BTW, An 18 year old kid got lost in the Smoky Mountains, walked out day before yesterday after 11 days. If you figure normal pack load out, that's at least a week having to eat what he finds. This is a thinking that's a good idea, food of opportunity. Its the same thinking of the downed pilots in Bosnia. You don't go hunting but gather what you can when you can to augment what you have. I bring it up because it does take some forethought like gun, fishing utensils, hell a bag to gather it in.
Tj