Hello Ivan,
Welcome to the Forum.
Replacement batteries, should you need them, can cost up to several thousand pounds.
There does seem to be a scarcity of capable mechanics who can (or will) work on them successfully.
Repair can be much cheaper, but then you need the hybrid technicians, as above.
In my opinion, in the more remote parts of Scotland it will be very difficult; if not impossible.
Nearer the urban centres could still present some challenges.
Personally, with your intended journeys I would avoid a Generation 1 Hybrid.
I am sure you will get several other replies from other members.