Today I explored Laythe with my Laythe SSTO spaceplane. The spaceplane has its own ISRU equipment, so it can land on an island, refuel, and continue flying elsewhere (or to orbit).
This is the pilot enjoying the view near Laythe north pole:
The issue with increased drag behind engine plates (https://bugs.kerbalspaceprogram.com/issues/25712) makes it much harder to take off from Eve - my Eve lander tested before the update is not able to get to orbit anymore. Hoping for a patch, or I'll have to make a rescue mission in true Kerbal style