Can I freeze unbaked scones?
I'd recommend freezing them unbaked. The crumb is a lot more delicate once they're baked and more susceptible to moisture migration, leading to them being soggy or stale (or both! at the same time!) when thawed. Scones, being relatively low moisture and not containing yeast, actually freeze quite well and can usually go straight from the freezer to the oven.

I've worked in several bakeries where we made giant batches of one flavor of scone and froze dough all portioned out so that we could always have several flavors of freshly baked.