If you can, I would still recommend using the calci sand for the small area of sand you have because if she does eat the playground sand it has a higher chance of impaction.
I've never used playsand, it's not fine enough. I only use the super fine calci-sand and we always check the bag a bit before buying it to make sure it's the smallest possible. We may have been given the wrong information about sand being good for young beardies when we first got Isis, but the breeder made a point to make sure we got the finest sand and told us to use calci-sand specifically because it was his favorite of any he'd seen and it's what her clutch was raised on.