In the Canyon, once you leave Glen Aulin ,campsites are limited. There is one by the bridge, one just below Muir Gorge Falls, others near the Junction of the Rogers Canyon Trail. But, If you had to turn around, you would be facing a lng uphill climb out.
The hike to Vogelsang High Camp is a gradual climb all the way out from Tuolumne. Tulomne Pass is a beautiful wide meadow, so there are plenty of camping opportunities as well as at the High Camp tenting areas. The hike up to Vogelsang is not veryy steep either and you pass by two lakes. Lake Bernicce is another great place to camp and the spur is less than a mile off the main trail even thought the maps and sign say one mile. Before that junction there are plenty of places to camp, too, with nearby water.
Oncedown from the pass, your hike all the way to the Valley is a gradual downhill.
You also go right through the High Camp at Merced Lake with good camping spots.
There is a tenting area near the jct. of the JMT.
The hike down to the falls is steep and rocky, but you kids would have fun on it. You will see plenty of day hikers there climbing up it. The JMT is an easier, but less interesting alternative.
A 5Pm or so YARTS bus will take you back to Tuolumne.
Lakes, mountain passes, a view of Mt. Lyell, water falls, views of the Half dome and two High Sierra Camps are all part of this hike.
August is beautiful time, little rain, no mosquitos,but nights can be cold, so take warm bags.
At this trip report, scroll down to the photo of Tuolumne Pass and below to see pictures along the route described here above:
Trip Report Thread: August 26, p. 4 "Yosemite loop hike....: