I think you have done a good job using the 77. With the snow cover you could try underexposing a little to get the b+w more snappy. I see you have about a 90° angle to the sun in all pics. This gives you the most snap and you could extend it with a polarizer too.
I don't know about that 77 for a 6 hour trip, though. If you have vast mountain ranges on the way or likewise cloud formations you will probably not get them with the 77 unless you are really quick with successive stitch shots and can do the postprocess.
I am a thermal paraglider pilot so I am basically always high (physically not mentally!) and do the landscape thing. You seem to be on the low side and keen on details so why not risk it with a fixed length like the 77. The 16-45 in AV-mode at f/9 and -0.7 EV would be my choice for a start. Try to include the horizon in some of the shots, could be interesting.
A rubber hood to flexibly rest on the window paine to avoid reflection is another way to improve IQ a little.
You must have been glued to the TV yesterday, it was a great game!
Have a good day flying,
Georg
Last edited by georgweb; 03-01-2010 at 11:28 AM.