I got the gif idea from The Clothes Horse.
So you're going backpacking, hiking, and/or camping? What to bring!?
1: A good backpack, mine is an REI Daypack Traverse 30, I think. It's great, it can fit a ton of stuff, has a camel back in it, and an awesome rain cover... What's even greater is that Tripp fits in the bag perfectly and it has clips in it to keep him safe and secure.
2: Shoes; Hiking Shoes, mine are Keen Targhee II, they are awesome, waterproof, comfy, and good support. Sandals, I have my Chaco Hiking Sandals, they are able to be fitted to your foot perfectly with their continuous strap system, and they have vibram soles to keep you from slipping. And lastly Mud Boots, mine are cute ones I got from Target years ago.
3: Snacks; bananas, cliff bars and fruit-bu are super portable.
4: Waterbottle; mine is a Stainless Steel Camelback bottle from Moosejaw.
5: Bathing suit; of course!
6: Extra clothes that are super comfy.
And of course not pictured: Tent and sleeping bag.