Well I am assuming the enclosure you made has a shallow pond and a large land area. If this is right, I think both 3-Striped and Mississippi Muds will do well in that setup. Just be sure not to overcrowd the enclosure. How many gallons is the pond?
Chris
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0.1 Red Eared Slider, 1.0 Common Snapper, 1.0 Bearded Dragon and a 55gal Native Fish Tank with a 6in LM Bass, 3 Crawdads and a Pleco.
I use to have a collection of Leopard Geckos that I bred, but have sold them.