I agree with Rick, Porcupine Flat is a really nice campground, especially the campsites at the back, across the bridge over Porcupine Creek. But note that there's no tap water available (you'll need to purify creek water for cooking and drinking), and pets are NOT allowed at the Porcupine Flat Campground (so you can't bring along your dog).
The White Wolf campground campsites are a bit more densely packed than those at Porcupine Flat (though there are a some nicely secluded ones at White Wolf too – though those are usually snatched up first). But the nice thing about White Wolf is that it does have tap water available for your needs (no need to treat, filter, or boil your water), pets ARE allowed, the White Wolf Lodge is easy walking distance from the campground for breakfast or dinner if you don't feel like cooking that day (though reservations are required for dinner since seating is very limited) and there are some real nice short or long day hikes from the White Wolfe campground.
Mosquitoes can be a problem at White Wolf, but no more so than at Tuolumne Meadows campground. So if you can handle the mosquitoes at the Tuolumne Meadows campground, you should have no problem handling the mosiqutoes at the White Wolf campground.
I haven't camped recently at the Yosemite Creek Campground, so I'm not sure how in what condition its access road (a segment of the old Tioga Road) will be in the summer. Last time I drove it (about 12 years ago) it wasn't in that great of shape. And like Porcupine Flat, there's no tap water available. (But pets ARE allowed at the Yosemite Creek campground.)
Edited 4 time(s). Last edit at 02/17/2012 06:12PM by plawrence.