Hi, Mathew.
I will not be able to play today, but I wanted to tell you that you may organize those events, but it would be better if you gave people some more time (if course, if you are able to plan something like that). You may have a look at Stronghold Nation, and see how they do it there if you want.
Also, they are about to play a Stronghold 2 multiplayer game in half an hour I think - you can join them, if you want. They planned that game few days ago, only I won't be able to play with them today.