When TSHTF guess who has to go get the adolesents?

19lb ain't unreasonable. 6.6lb of that is water. Add in a poncho, knife, multitool, headtorch, map, compass, gps, paracord, RSK and a first aid kit.

And my lunch!!!!

The big killer is the pack itself. If its of good quality and fits correctly then an adult in reasonable condition can carry that all day, every day. If you cannot then frankly you should not be there.