shirokazan said:
I think Amaferanga and Joe have made some sound comments.
For your updated route:
1) Chepstow to Monmouth: I found the A466 OK. It's a bit of a slog pulling out of Chepstow but then you'll just fly down to Tintern. For reference I went along it between about 6pm and 8pm. You might wish to check the elevation of your route along the B4293: could be some serious climbing there (I've never been along it).
2) Gretna to Glasgow: I did the B7076/B7078 and found them to be extremely quiet and, therefore, a top choice. I didn't go through Glasgow, instead taking a very wide circle south of Glasgow and crossing the Clyde at the Erskine Bridge (which is at Old Kilpatrick), but given that you want to keep the mileage down I can understand your choice of route.
3) A82: Quite a few cyclists would avoid this, regarding it as just too dangerous these days. Particularly north of Crianlarich. I've only ever driven along it but would agree.
4) A9 South of Inverness: Between Pitlochry and Loch Moy, I've cycled alongside this on the NCN 7 cycle route. This is a cycle path formed from bits of the old A9 (you can see some faded lane markings) or gravel/stone/hardpacked earth track. Some people find the latter a bit rough but I thought it was fine (and I say this as someone who will always choose a longer tarmacked road over some rough old forest track). You might wish to consider using this route in preference to the A9 itself.
5) A9 North of Inverness: I've used some of this between Inverness and Tain. Crossing the Kessock Bridge (immediately after leaving Inverness) you can cycle on the path rather than risk life and limb on the road itself (I did the latter on my first tour of north Scotland in 2007 - I've no idea what possessed me). I can't see why any sane, rational person would follow/use the A9 after the Kessock Bridge other than to save miles or purely for the experience, it's just dreadful. Take up amaferanga's suggestion to go via Altnaharra, you won't regret it: I've done it twice now.
Enjoy your trip!
Thanks man!
1) Ive now changed this back. Im taking your word that its gonna be a half decent road
2)Glad to hear this is a good route! The point G on the map is right near my friends flat where we are stopping this night so we have to go right into glasgow on this day otherwise we probabbly woulda went via the erskine bridge aswell.
3) Still unsure about the route after Glasgow and haven't decided on this yet

. Im very familliar with this A82 route having family in fort william and have always wanted to cycle through glen coe etc.... However I will speak to my mates about this and see what we all collectivly think about it.
However you sed you went over the erskine bridge on your cycle trip but have only driven the a82? What way did you go then from there (on cycle) because going over the erskine bridge would suggest you would then be taking the A82 rather than heading East?
4) If we choose to head east after Glasgow then I will deffo take this.
5) I am now amending our route to head via Altnaharra as recommended by you and Altnaharra
So my real area of uncertainty now is whether to take the A82 route between glasgow and inverness or the more eastern route (which I am not familliar with at all)
Again if anyone has any further suggestions/ recommendations of routes that are less dangerous but still dont add too many miles then im all ears!
Thanks alot so far guys!
Updated route for anyone that is interested:
http://maps.google.co.uk/maps?f=d&s...56.632064,-4.416504&spn=3.015484,7.042236&z=7