There really isn’t a bad place to camp in the Mt. Hood National Forest. For starters, you should bookmark this complete list of campgrounds in the Mt. Hood National Forest.
If you don’t like crowds, the Lost Creek Campground off Lolo Pass Road would be a good option for you. It’s near many hiking trails, such as the ever popular Ramona Falls. Another option is the Green Canyon Campground on the Salmon River. It does get pretty busy, but there are lots of spots you can hike in to next to the river and camp, and some beautiful trails in the area.
While wildly popular, and usually crowded on a sunny weekend, our favorite spot to camp is one of the many campgrounds around Timothy Lake.