In some respects the situation with MGSF reminds me of the 1993 Worldcon. In the few years leading up to ConFrancisco, I had made something of a name for myself doing at-convention newsletters. When we won the 1993 bid, some people took it for granted that I'd be doing the convention newsletter. I said, "No, I can't do that and run the WSFS division as well and about eight other jobs on the committee." Something similar is happening this year at Worldcon. I'm overbooked. That show takes a whole lot out of me and out of Lisa, so we're only mildly disappointed. It does mean a little less work and a little more rest at the convention.
I rather expect we'll do multiple shows at Westercon next year, so save up for the trip to Utah in 2019!