This seems really interesting ^^ I'm willing to attempt it, if you'd let me. I'd rate myself as a higher intermediate, as I've been making maps for over a year and a half, and getting closer to "Pro" with every map I make. I've got some friends who can tell you what I mean if you want to talk to them. I'll gladly show you my best map (And it wasn't even too long ago!) if you'd like, it gives great examples of how I can create height masks, make different dens, make mountains, and the different meshes I've got.
Though I'd ask for more details of the packs - such as info on the plants, rocks, water sources, where they're located and such, if it's not too much trouble. The more description you can give me, the better job I'll do ^^;