In reply to mike123:
Have you done An Teallach before? and are you planning on doing the crest of the ridge or the bypass path?
We're at that point of the year where it isn't Summer anymore but it isn't established into Winter conditions, so potentially harder to negotiate ridges like An Teallach, especially alone. Saturday looks like the visibility will be very poor, with potential of snow falling.
If you've never been there before it's an awful lot of the weekend to spend driving to do arguably the most impressive mountain in Scotland but poptentially not see much of it or the incredible views it has to offer.
I once did Liatach in heavy rain and 0 visibillity because I was so hell bent on doing it when in the area. I now want to do it again as I didn't see it last time, and from that experience I've learned to save those first times up special mountains for decent weather and vis.
Well worth exploring the Fisherfield area too if you're able to save the visit for when you have more time.
With all that said, if you're super keen to get up this weekend and enjoy it for what it will be then have an amazing time and stay safe.