As I mentioned in a previous post, according to the SNP's referendum manifesto they have no intention of immediately setting up a driver and vehicle licensing agency or a civil aviation authority. The DVLA bit is probably to reassure Scots that if they moved to a job in England, they wouldn't have to re-register their car after six months (EU rules). Without a CAA they would not be able to be members of the ICAO, a United Nations agency (one wonders if the UN would consider them to be independent enough to be UN members).
As regards the Typhoons and Lossiemouth, I wonder if the SNP realise how few people would be left at the base when all the English RAF personnel who are only there because they were posted there return south of the border.