The first time you go backcountry you'll probably ask yourself "Why did I bring all this stuff?!!". You can be comfortable with a lot less than you think. Backpacker.com is a good place to get info on what you would need. It's different for everyone. Some people are willing to carry a lot of weight for more comfort in camp. Not me.
The park campgrounds are a good option if you just like to camp. We do both. In the campgrounds you can bring everything you think you may need and have access to a lot of good water too.