Actually wolfpacks are included in NYGM 2.2 which is one of the mods useable in Wolves at War. I was involved in a Wolfpack attack during my 2nd patrol there I think. Sergbuto I believe was the author of that mod and you can get it seperately for other mods. Pretty sure GWX will include wolfpacks, but not for certain till it comes out.
Trying to coordinate the dots of active captains across the Wolves at War group, or any online community like that, would be extremely difficult since not only do players not all play at the same real world time, but they also don't play at the same in game time. On Tuesday night you might be on a patrol from March 1st, 1942 while I might have installed some new technology and wouldn't have sailed till March 11th, but we'd be playing at the same time in the real world.