https://www.ternbicycles.com/bikes/gsd vs
https://www.larryvsharry.com/
Long tail Vs Long John/Bakfiets Look you can get an enclosure to keep the kids dry .
Also in the long tail category is Bike Friday's Haul a Day and there is the Xtracycle..
a small shop in Eugene makes a steel version of the Danish long John the Long Haul .