1: by far yes. I have attended 4 regular airsoft games in 6 years of regular airsoft games vs dozens of ww2, and I always find the re-enactment "games" better in nearly every way.
2: We attend living history events with the Vietnam groups and they are great guys in every way.
I would say research different units and find one that speaks to you, even if it means that unit do not exist. Our organization started as 1 guy out on the field and grew from there. No matter what unit you do you will find we all have the same mindset. Feel free to contact any of us for more information.