What I like about the fully-rigid SS setup is the total transfer of everything you've got going straight to the ground. My bike is super-smooth and the rigid front end has a lot to do with the feeling.
LHG, presumably you cope fine SS ? I'm in the UK and pretty much only ride SS (Jones Spaceframe/ Truss Forks / Fat front) .... and I find it supremely comfortable. Not tried bikepacking yet but it's good to hear you SS as this would be my preference .. :0)