I just got done watching the last Episode 6 (each 2 hrs) of the Ken Burns Film "The National parks, America's Best Idea" on PBS. Second time I've watched it.
WOW what a great emotional and almost spiritual experience. If you haven seen it GO GET IT AND WATCH IT.
I have been to several Natl Parks and LOVE THEM but now I want to start visiting some of the smaller lesser known and less crowded parks on my next journey. With your Senior or Access Pass admission is free you know and camping is also reduced. GO FOR IT