I keep my fence lizards on course vermiculite (dry). They can find the crickets in it and have had no problems with impaction. Sand tended to cause problems for the hatchling fencies with impaction. The vermiculite is also a good burrowing medium.
I put a little pan of water crystals and a shallow dish of ground cat food for the crickets and egg crate for both the lizards and the crickets, and the lizards have no trouble finding and eating the crickets. The little lizard tub has an UTH for warmth, and on sunny days can be put in the sun for UV.

I know fence lizards are not bearded dragons, LOL! but some of the same husbandry needs apply to both species.

A couple of tiny skinks also live in this tub, and are also thriving.