Mr. Wilson, as I am on my way to the PNW in just about 6 months or so, I tried to click in the imbedded link in your post to see the group, in case I was welcome to join now, or even just to keep up to speed for joining later, and I found a "Group not found" message.
Group Not Found
There is no group called pwnopencarry. Please make sure you typed the web address correctly. If you have done so, the group may no longer exist.
You may also search or browse for groups on the Yahoo! Groups Home Page.
I did not attempt the "join-up" email link.