This time I played twenty questions with some folks in the know and I think I may have figured out at least a couple things I was doing wrong. Either way I'm hoping my hungry little garden will at least last the season and maybe take out a few pests in the process.
The difficulty in this was more gathering materials than executing the project but I did at least one fun thing that was ind of interesting and I did learn a bit.
I also ended up writing a second Instructable after learning a lot about carnivorous plant potting soil. http://www.instructables.com/id/Potting-soil-for-carnivorous-plants/
Step 1: Materials
The plants. I went with a classic Venus Flytrap and an interesting Sundew. Probably could have used at least one more but I'm hoping they'll grow to fill in the spaces and I'm trying to encourage some moss as well. There's always time to add more if it looks too sparse.
Animal skull. I used a raccoon skull I picked up at the same shop I got my plants from but I have a growing collection of type specimens I've been collecting since childhood and then used extensively working as an archeologist. Best to not use something unusual. A raccoon was the perfect size and you can get them cheap on the internet if you can't otherwise obtain one.
Distilled water. Tap water or even bottled water will kill Venus Fly Traps and other bog plants. I'm told rainwater is OK as well and has been good for my orchids but I haven't tried it on this type of plant. Distilled water is inexpensive so there's no reason not to use it. Bottled drinking water often has salt added for flavor and will kill your plants and while chlorine is very bad for them it's not the only thing in tap water that will kill CP's. So setting it out over night won't help in this case.
Total cost if you go out and buy everything is probably around $40.