Hey DaKa, just started the first mission, but I scrapped the Chernarus (and addon) part, to avoid mission creep.
My mission starts off in Takistan, with a Czech SF team flying in to guard a medevac where there is danger of enemy contact. They discover that the cause of the injuries has to be an IED, the injured persons will be evacuated and during the night our SF team will thwart a kidnapping event only to discover intel on a remote safe house where some hostages are located. Did not do the safe house part of the mission yet, it should be a rather easy one, since it is the first mission. The remainder of the mission will be a hostage rescue mission, and maybe there should be another task as well, since there is not much to the mission yet.
The larger background would be an Afghanistan one, with NATO troops in FOBs, setting out on patrol, and SF teams trying to win hearts and minds.
Do you think you can work with that or do you prefer to use a Chernarus setting?