Read the Fantographics books, especially the mid-1950s through the late 1960s. No adults to be seen (except bizarre outsized creatures in one series of strips Schulz himself regretted drawing), strangely empty and sterile neighborhoods, the older children like Charlie Brown and the aged-up Lucy making disciplinary and judgement calls normally left to parents for their younger siblings, Snoopy growing from a normal-looking beagle puppy into a giant-headed freak (all that nuclear fallout.) Admittedly, this does create some problems with where Rerun came from....