I may be biased because I used to live there, but Stornoway would have my vote every time. Great airport and the chaps in the tower and on the ground are great. I have never been out in Wick but Stornoway has a reasonable night life and there are hotels for most budgets. There are some great places to eat as well. Speak to Stuart the catering manager at the terminal for the latest low down. There is no maintanence but a large hangar and you might get a cuppa from the guys at the SAR unit. Call the tower and ask to speak to the on duty ATCO for tips, costs etc.