Yes, agreed. Avoid Loch Lomond. Stirling to Crianlarich is a far better route for a Westy, and gives options to detour as Scottish Westy says.
High Bridge is just along the road from me. It is a 15-20 min walk from the Commando memorial. Probably sign-posted from the car park, I haven't noticed. I go over the stile that is opposite the entrance to The Old Pines Restaurant. This is a few yards down the road after turning left out of the car park.
With the exception of the Cuillin Hills Hotel (quite expensive), the other Hotels in Portree are rather limited on parking space, if they have any at all. Most rely on people parking in the public car parks around the village. The Marmalade is the only other one I can think of with half reasonable parking.
I hope to be able join in some of the routes if my Westy rebuild is completed by then.