What is the name of this horror flick?

I think it was made in 2008-2010? About a bunch of young adults in
1969 hitching a ride to DC to protest. Along the way, the guys pickup
breaks down and they find an old house and barn and spend the night.
There is a retarded psycho kid and his evil mother and grandma in the
house....

It was the worst movie ever...

Name it?