What regulations are in place for ultralight vehicles flying over US national parks? A flight instructor i met with recently said that flying ultralight over national parks is a crime. The law section of the powered paragliders bible has nothing on parks. 

One would think that commercial vehicles wouldn't be needing to  plan around parks above a certain altitude.  But ultralight vehicles may have different regulations. 

After further reading into the book,  it says "almost all state and federal parks prohibit launching aircraft and ultralights except at airports." Nothing about flying though
The use of mechanized items, which UAS, ultralights and other aircraft are considered are prohibited from Congressionally Designated Wilderness areas.

That designation does not appear on a sectional chart, but can be queried from the supervisor for the park or forest.  As far as I know, overflights, particularly those by manned aircraft are not prohibited, but launch, recovery or operation from the wilderness area is prohibited.