Ya, I was going to post he end of the story.
One of you had gone in because you got a notice saying you had to renew in person. JimH?
Anyway, I took a snapshot of Eagle Cap's website dry weight spec (that is wayyyy lower than actual), and took it in. Before I said why I was in there, I played dumb and just asked to renew the tabs.
They asked, "what kind of RV is it?"
I said, "a truck camper, you know, one of those small fits-in-the-bed kind".
They said, "Oh, ok, the computer said we needed to update our records".
No question of weight came up. $15.
I was pretty hot about that notice about having to get it weighed. If you couldn't tell....