Hi, I'm not the OP but I am the creator of NPMaps (many thanks to hownottowrite for submitting this). I would indeed like to get around to Forest Service maps after I finish with the national park units. However, they're lower on my to-do list because I've found Forest Service maps to be much more time-consuming to aggregate. Fewer people are searching for them as well.

So, it will happen eventually! I just can't promise it'll happen until I finish the national parks -- unfortunately, it'll be a while since I work a full-time job and this is just a side project when I have free time.