Do the Druid's Goodberries rot if you won't eat them immediately ?
I'm wondering if a Druid with a sense for business could set up a small stall in the Druid Grove, near Trader Dammon and Auntie Ethel, to sell Goodberry jam, Goodberry pies, etc. I think Gale is a good cook, so he could prepare those from the Goodberries.
That would be an excellent way to make some extra gold with the companions that you don't need in your party at the moment, instead of letting them lounge around at camp all day while the others do the hard work. As long, of course, as the Goodberry jams and pies are balanced out with a proper cheese selection. Maybe befriend some druids, milk them in cow wildshape, etc.