Thanks for doing the google.
I have King Arthur on Steam and I'm sure I bought a pack with some of the expansions. Can't figure out what expansions I have without running Stema in online mode and thereby updating Skyrim as a side effect. Not liking Steam today, either….
EDIT:
OK, it look like I have the Druids and Saxons DLC. If I DL from GG I can forget about Steam for KA.

But $10 seems a bit steep for just the other 2 DLC.