I saw your post in the US orienteering ideas thread about minimal lidar maps. I've tinkered quite a bit with lidar and Jarkko's kartapullautin program. I can say I've gotten fairly good with it.
I am very open to making maps and teaching others how to use kartapullautin. It has a bit of a learning curve.
Contact me at my email address if you'd like to do something along these lines.
I've been doing a bit here in Colorado using some free LIDAR, mostly created for flood control studies. It's quite detailed (7-10 samples/sq m). It's too bad that kartapullautin doesn't capture boulders, since the data should be detailed enough to do that, thereby making a nearly complete map. Terje Mathisen has some software that he used to do that for me, so maybe I'll just ask him. What kills me here is the time and memory that it takes to run kartapullautin on that data, particularly in the cliff generation phase, which tax my pretty good laptop. Maybe I need to data reduce.
Most of the data I use in Spain is 0.5 points/sq. m. I think the best would be around 3-4. So you can definitely reduce the data.