Yes, this, though maybe they could propose 2-3 possible weekends within their package which we could narrow down after the initial vote (i.e., in a west coast year, I could propose for Tucson April 3-4 or June 11-12; Cass might propose Portland April 11-12 or June 17-18 [dates totally made up here]; and if Portland won, we would then only have two dates to narrow down to)? And the date proposals themselves would be totally determined by the pimper, so one city might have spring and summer choices while another might be only spring or only summer. That makes so much sense to me.
If a site has more than one awesome date this is worth considering to be sure... The awesomeness of Survey Monkey nothwithstanding, however, I fear we loose interest/focus among the cat herd when we have more than a couple of votes. Momentum seemed to be a problem this last round.