Oregon Dunes National Recreation Area 

If the grass is invasive maybe stop closing the 4x4 trails that prevent it from growing back . Im sure many 4x4 clubs would be more than willing to work with the state to maintain trails and the sorrounding enviroment

Sleeping Bear Dunes in southern Michigan shares some similarities to this area.

Your supposed to get rid of invasive plants closing the dunes is protecting invasive plants and now the dunes are being taken over by them and closing area to recreation is wrecking the Oregon dunes not protecting

You guys should open a little bit more ORV riding area to help kill off that non native grass :)

Stop closing my dune access off and let me use what I pay for...can't use my rzr on the street