Be sure to create a unique clustered key / primary clustered key on SiteKey in the #Sites tables. With only ~20+ rows it may not matter, but it can't hurt.
SQL DBA,SQL Server MVP(07, 08, 09) Prosecutor James Blackburn, in closing argument in the Fatal Vision murders trial:
If in the future, you should cry a tear, cry one for them [the murder victims]. If in the future, you should say a prayer, say one for them. And if in the future, you should light a candle, light one for them.