It's almost impossible to get a spot at the campsites in Yosemite Valley these days, but if you do you are lucky.  There are a ton of campsites here so it always seems overcrowded, but it does give off a good community vibes with lots of groups and families around.  If you bring a bike you can easily get to anywhere in the Yosemite Valley in minutes without having to worry about walking a couple miles or parking your car.  Several of the top hikes are within walking distance of the campsite