It's definitely doable - ice certainly won't be an issue that early in the season, but Scotland can have rubbish, cold, wet weather in midsummer, never mind October where the days are much shorter, especially the further north you go.
That's not to say that good weather at that time of the year isn't possible, just that you'll need to be luckier than usual to hit a weather window.
As a rule of thumb, the east coast is generally a lot drier but colder.