Hi!
-How to tell the weather?
Try post number 7 in my thread here:
http://www.ukgser.com/forums/showthread.php?p=1272291#post1272291
-Do you have any idea how the weather normally are in Scotland at that time a year? If you dress for that I think you'll be OK.
Sometimes we get some snow, not much, up on the mountain roads, in September, and it melts the next day.
Close to fjords in the south part I feel 99% sure you are not getting any trouble with ice&snow on the roads.
If we get snow early the narrow roads up in mountains close for the winter, but I feel 90% sure that will not happend in September. If that happends there are other roads for you, all you miss is the funniest hairpins - mainroads is OK.
Small campsites in area with not that many tourists my close for the winter the last week in August, but I would not worry about that. There are plenty campsites open in September, and if you do not find a campsite then there are hotells. The hotells often have not that expencive rooms off-season.
-Do you bring a tent?
-Are you alone?
Keep in mind a hytte/hut/cabin at a campsite may cost about the same as a room at a hotell, if you are alone.... If there is two (or more) persons sharing a cabin often are the cheapest - not a hotell. (There are no food at the cabin, and food cost too...)
You know you can put up your tent for free in the forest?
You can stay at the same place/spot for 2 or 3 nights - it is legal!
Please do not make a fire, or use an old place for bonfire, and leave the spot as clean&nice as it was when you arrived.
I hope this helped!
Liv.