Someone earlier mentioned St John’s College (in Annapolis, MD and New Mexico)…and I have been wondering the same thing. IF he can get over some of his fear of writing, and if the school could accomodate his slower pace…it seems as if it may be the intellectual learning-for-learning’s sake kind of paradise he would thrive in and love. However, I am not sure if there is any choice of coursework at all in the curriculum (all students study a “great books of western civilization curriculum” ) but it’s a very unique program you might want to look into.
Also, for environmental studies, maybe look into Warren Wilson College in North Carolina? I don’t know a lot about it, but I think it’s a school that can give individual attention to students, and has an environmental focus. Don’t know if there would be enough of an intellectual vibe, though.