Reddit mentions of Go Anywhere Toilet Kit 12-pack

You'll need a pack (obviously): Check your local gear shops and try them on in store. Understand how they're supposed to fit.

After that, if you follow the 10 essentials you should be covered for the basics.

1. Insulation: Layers are key. Even if it's 60s during the day, nights can drop into the 30s. Be able to bundle up, understand the area you're going. Will you want natural or synthetic materials?
   
2. Hydration: For me, means filtration systems as well as storage. Filtration such as a gravity bag or hand pump. I always have iodine tablets as a last resort. For carrying, a you can't go wrong with a Nalgene or two for sure, but then I highly suggest getting an MSR Dromedary and then attach one of their hydration hoses to it. They have the capacity of CamelBak but aren't as susceptible to springing a leak.
   
3. Illumination: Headlamps or flashlights. Just be able to navigate in the dark.
   
4. Navigation: Map and compass (with the knowledge of how to use them!) are vital. If you feel like spending the extra money and getting a GPS unit, that's up to you.
   
5. Nutrition: High protein, high carb (get that energy!) Trail mix, Cliff bars, bread and peanut butter are my go-tos.
   
6. Shelter: Tents are great, bivys are lighter, I swear by my ENO Hammock. Always check to see if you need to waterproof what you have, understand its setup and make sure it's adequate for the weather you'll be facing.
   
7. Fire: Lighters or matches, just make sure they're in a watertight container. Kindling is good but most places I go I can find stuff laying around. That being said, cotton balls and Vaseline are great and cheap.
   
8. Repair kit and tools: Things break, it's important that you have the equipment to repair them. Patches, duct tape, and a knife are always in my pack.
   
9. First Aid: Have a way to patch yourself up. Rolled ankles and blisters are not uncommon when you're backpacking. If you're able, I highly recommend taking a wilderness medicine course. A Wilderness First Aid is fine, but if you can commit the time and money, a Wilderness First Responder will take you far and make you an asset to anybody and everybody in the backcountry.
   
10. Sun protection: Sunscreen and sunglasses are a must. A brimmed hat is highly advisable. I also try to have chapstick with some kind of sun protection on me as well.
    
    These are the biggies. Obviously you'll want other things depending on where you're backpacking. When you get anything new, make sure you take it out and use it at home. Understand how it works and how you might need to improvise if something on it were to break.
    
    It might seem intimidating at first, but backpacking an absolute blast.
    
    Edit: Pooping! Understand the regulations of your area. If catholes suffice, then a trowel will be useful. If you have to pack it out, there are commercially available Wag Bags, or you can make your own with grocery bags, kitty litter, and ziplock bags.
    
    Also, everywhere you go, understand that it is for everybody. Abide by the Leave No Trace principles to ensure future visitors can enjoy their visit as well!

Amazon has a solution to that problem.

Yup, safest (but kind of gross) method is to just pack the shit out in an odor proof bag.

Popular product for packing shit out : http://www.amazon.com/Phillips-358005-12-pack-WAG%C2%99-Bag/dp/B001P6ZFG2?tag=r601000000-20