I am in love with the way you do your forests on your maps. Did you make a brush for it or do you paint it out every time? I would be very interested in a tutorial on your process. Your maps are absolutely stunning.
For my forests I usually use a program I've developed called TreeThing. It uses a bunch of tree brushes you create and then places them randomly according to a template you load in. This gives me the basic layers and I then do a bunch of post editing in Photoshop to get them looking better. If you're interested in using the program then go to the Cartographer's Guild forum and do a search for it there, although if you use it I'd request you post a link to it in any work you use it for and maybe drop me a link on here so I can check it out.