Jon like a few people have already mentioned, The first week of May is right in the middle of College Finals all though out the west coast. We have many BMW enthusiasts that are currently in college, and this move in date would benifit quite a large percentage of active BMW enthusiasts.
I think it would be in the best interest to move it forward or backward a few weeks. Plus Cino de Mayo is also on the same weekend like the last two events. Hotel prices are higher because of that also.
Just my .02
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