The tough thing here is that not everyone is going to have the system, so my plan as a DM is to just use the stuff I can use, like the exploration pillar stuff, treasure tables, monsters, etc, and hope others come around quickly to the rest of it.
I've already been thinking a good bit about starting my first LU game with Ghosts of Saltmarsh, hopefully leading into the Slave Lords. That's one of the good things about being something of a Grog- there's a whole generation of players out there that haven't seen all the classics yet...