Yeah, they're harder, but they have bigger rewards. :)

2 planes per campaign?

Well if it's one of your favorite planes then I guess it's worth it.

Multiplayer really gets you the best unlocks, but actually finding a game is harder than any of the single missions.

I dunno, they just seem to be "pick me ups" in a way? I think Single Mission and Campaign give you the best planes, though I'm still working at getting my Il-4!!! in multiplayer.

well I guess it's down to your opinion. Personally I think single player gets the base planes, but to max out, you need to play MP, I mean getting the more advanced versions of planes, and getting custom weapons.

Right now I'm working through the Korsun Pocket single missions to get the po-2 and it's giving me a bit of trouble!

Yeah things like different weapon loadouts come with online I think more than SP.

didn't have a problem getting the hurricane back to manston, just stayed in the clouds, struggliing like hell though with the mission where you are providing cover for a gaggle of IL2's, 1 109 comes through and they scatter, you can't cover 12 planes that are flying in 12 different directions.

Maybe I just had bad luck is all. I finally figured out sort of a pattern where the enemies were and just planned my flight path accordingly.

Your right, most weapon loadouts get unlocked by online play (which I do, not lately though :() but all I see the loadouts as, are 500lb bombs etc. for the fighters. I just keep the fighters how they are, no need to add drag, because I think that the bombs and rockets actually do add drag to the fighters and other planes? I think it said it in the game actually?