What to expect at national parks this summer: big crowds, fewer reservation rules, and a less predictable visit

People gather at Glacier Point to watch the sun set over Half Dome in Yosemite National ParkEric Thayer/Los Angeles Times via Getty ImagesNational parks have fewer staff and fewer reservation rules this summer.Parks like Yosemite have already experienced long lines and crowding this year.Park advocates say to be prepared to wait if you're visiting a busy park and have a backup plan.The National Park Service is heading into peak summer with fewer permanent staff and looser crowd-control rules at