I've kept amphibians (still have some) and have learned a lot from blackjungle.com. Great website! Here is a link to one of their showcase displays.

Showcase Terrarium - a set on Flickr

Although this is NOT for garters, their methods have taught and inspired me greatly. For example, I have learned very simple things such as how to bond 2 pieces of wood together (where it holds securely and is nontoxic) and I have incorporated their techniques on many of my setups including snakes. Anyway, just wanted to pass on a great website that I feel is inspirational.

Welcome to Black Jungle Terrarium Supply - The Natural Choice!