Do you think these will freeze nicely?

Without the glaze, definitely. Just thaw at room temperature, then refresh in an oven or toaster.

Yes, I'm sure they will. Let them cool thoroughly, and then wrap tightly. i usually freeze baked goods with a double layer - wrapping tightly with cling film and then wrapping that in freezer paper.

If making for a party or other special occasion, I'd wrap the scones before drizzling the icing and then add the icing right before serving. That will ensure that the icing tastes extra lemony. ;o)