I guess a meetup is what you want it to be, and if you own the wood, you make the rules!
I can only comment about that happened in the Devon meet, I think everyone at the meet were a little apprehensive initially, I also think we had very little in common other than bushcraft, but as we talked I think we found common ground, and all went away with the feeling that we had met people we could get on with. Everyone seemed enthusiastic over the suggestion of making this a semi-regular event and we will probably have a few walk-a-bouts on the moor sometime. I personally learned a massive amount for such a few short hours and hope to learn a lot from these guys in the future, I certainly have a new found respect for them. What actually happened was we initially discussed the kit we had, that led to disagreements and differing opinions over kit uses etc, it went on from there, carrying a little kit with you certainly got the ball rolling. We spent the time swapping information, talking about bushcraft in general, the forum in particular. Even a little philosophy.
I would suggest that you make the initial meet up relatively short, you are all strangers and people need time to get to know each other, also meet in a public place, this is safer for all concerned (even if you look like Arnie!). Why dont you meet in town for a few drinks first, you dont have to go to a pub, (although it helps to break the ice), you could meet on a Saturday morning or so, that way you make sure you can get on with them before you invite everyone round to your woods.
Greg