Concept - Faery Outpost (colour)

My paintings always seem to look weird when I do a greyscale one, and then turn it into a colour concept. Next time, I'll try going straight into colour -- maybe my problem is just that I need to get a better handle on colour! Anyway, here it is -- and next time I do an environmental concept, I may try incorporating photos (of my own, of course) because it seems like there isn't a single concept artist out there who doesn't half-photomanipulate their concepts. I don't know how I feel about that yet. I'm a pretty strong proponent of doing things as similar to traditionally as possible, but I'll try it at least. Especially since all my competition is.