I joined at my usual time (an hour or so into the session) which didn't seem an issue as the session overran somewhat and many of us stayed to play a final mission together to end. I particularly enjoyed this as it was a good opportunity to see how MARSOC players run their squad. A little more tightly controlled than ours (for better or worse), it was a fun way to end the night.
However the highlight for me had to be the earlier "destroy the caches" adversarial.
It's just a shame the BLUFOR team never went for any of the caches and instead opted for a picnic at the Villa, followed by a light BBQ and festivities in the nearby town where we were waiting for them. Calling them out and the anticipation of the attack was particularly fun (bear in mind this is an FPS where you do more thinking than shooting). I suspect that they weren't used to playing against irregular OPFOR and this made things all the more interesting, since Bit managed to steal a Humvee and we managed to successfully defend the caches. Playing as the guerilla force was highly entertaining as we all found ourselves engaging and retreating repeatedly throughout the mission.
I was also rather hoping to try Tigershark's mission, perhaps we can play this during another session (with or without the MARSOC players) as the premise is good and the mission gives a lot of scope for different strategies.
I hope in the future we can do a few more such encounters, particularly the adversarials...

My hearty thanks go out to Fer, Tigershark and Spirit and all those involved in making the last few hours happen.