Only 3 weeks away! Bring one, or two, or maybe more typewriters. I don't think anybody is going to complain if you bring more. Whether you just want to show off something amazing, or perhaps want to trade/sell. Eat lunch before you come, but there will be snacks and water.
The extended weather forecast says we should expect the weather to be sunny and 70, but since when can you trust extended weather forecasts? If the weather does turn sour, I have reserved the meeting room at the nearby Tully's for 2 to 6pm. The final decision whether it's going to be held outside or indoors will be determined at least 3 days in advance and will be announced on blog and facebook.