My wife and my two daughters stayed in Guffy June 13th and 14th (weeknights). We had the place completely to ourselves. We were there because we are hiking the PCT in continuous pieces from Mexico to Canada over a period of years. We got in over 50 more miles. My girls are 8 and 14 years old.
Guffy is a wonderful campground. We live in and frequent the Sierra Nevada, and still thought this was one of the nicest, most "viewful" campgrounds we'd ever stayed in.
While there we also wanted to summit Baldy because it is the LA County highpoint (our other "family fun," long-range activity is trying to summit all the California County highpoints). But we didn't want to drive all the way around to do Baldy's normal route.
We did Baldy from the north, from Blue Ridge Road, over Pine Mountain and Dawson Peak. (The other advantage of this route (besides us already being within 3 miles of its start) is that we summitted two others of the tallest peaks in the range.) This is 10 miles round trip. There is an established trail, which is obvious, although it is rough enough at one point (for a quarter mile) that I would rate it "Class 2 plus," although, obviously there really isn't such a rating. The drive from the town of Wrightwood would take about 1/2 hour, to the start of the trail. The Forest Service Visitor Center just beyond town has a handout map that briefly describes the hike. It is shown on the topo map I had.
This photo is taken during the first qurter mile of the hike:
From Dawson Peak, looking at Baldy: