I was planning on doing things a little backwards and had a question about the dates. If I am understanding correctly from 1/5 to 1/12 is when people select what they want. On 1/12 that ends and we get a list of what to send and start packing it up. Then we have to have it postmarked by 1/19? If it actually has to be to you by 1/19, I may have to do some more things ahead of time.
Trading Begin: January 5, 2016 (7 days)
Trading End, Send Seeds to Host: January 12, 2016 (7 days)
Deadline for seeds to be sent: January 19, 2016 (11 days)
I wanted to be able to offer a good selection and quantity, but not have to make up every seed packet ahead of time. I have done that in past group swaps and made up way too many packets of one thing and not enough of another. It ended up being more work and I had a lot of leftover seed packets to donate. So now I usually just keep my collected & cleaned seed in big envelopes and print out a bunch of labels with everything filled in except the last digit of the year. That way I can quickly make up new trade packets as needed. But, in a very large swap it may still take me a few days. If it is possible to see what is being claimed during the trade phase, I could work on it then as well.