Here is Gus Rentfro's site that gave me lots of inspiration for my cage design. I used his basic idea and added a bit here and there, but this setup works lovely.
I leave my lizards out day and night. I don't start doing this until I know the temps won't dip below 45 F. Seems cold, but that's early spring in the desert too. I have pretty good drainage in my pen too, so I don't worry about flooding, even in Thunderstorms. The entire perimeter is fulled with 3/4 gravel which all the walls set it...I also have some burried chunks of concrete pieces that have been topped off with soil on the inside of my pen...the water absorbs pretty quickly. Lots of plants, rocks, hides, and it is complets. My I left homet his morning, my adult male collared was out basking, as it was already 72 and sunny. Normally, my chucks are the early risers.
I always toss in dandelion flowers for the chucks, and also have 2 or 3 growing in the pen for the greenery. I have a few different plants growing in there, and have seen the chucks eating on them...different types of sedum for ground cover. The chucks eat those and the dandelion greens. I also have coreopsis in there, and some basil (I think). I only supplement with the flowers. I should probably supplement them more, but they are growing fine and look great out there.
Was the nice attributes to the pen also, is the fact that you can take so many pictures that appear to be from the lizard's natural settings.
Have fun, and keep us posted on your design! See the link below the picture for Gus's design page!!!
John Eddington

Click here for Gus's link!