Yosemite is the golden gem of the National Parks system. It's one of a kind landscape and unmatched beauty is something that has to be experienced, not just seen.
Getting there: The drive down into the Yosemite is grueling... you WILL be stuck behind someone who goes 10 mph under the speed limit, its taking picture on their phone while they are driving, and has a turn signal on the entire time. These people are the unavoidable demon of a place so famous and beautiful that every gaper out there wants to come and see it for themselves.
Campsites: Upper Pines sits along the Merced River and just on the North edge of the campgrounds for the valley. It location is great for access to the trailheads for Half Dome, Mirror Lake and Nevada Falls. The whole campsite has a great view looking up at Half Dome. The river is a perfect spot to wash off or cool down after a hike. WARNING: Because Upper Pines sits along and is so exposed to the forest there is HEAVY BEAR ACTIVITY. Keep your campsite clean, keep all food/toothpaste/sunscreen/anything that smells (even canned beer or alcohol) in the Bear Bin. I have stayed at Upper Pines about a dozen times and about half of those trips there will be a bear incident someplace in the campsite. If you're not prepared to chase a bear away from your tent, your car, or your family... stay someplace else.
The Park: Yosemite is awesome.
What to do: I'm sure this will be covered more in-depth in a different review.