Hey SMC,
You'll really enjoy the K5.....especially on a trip to Alaska. The dynamic range is really quite good, where you can shoot underexposed if you need a faster shutter speed and then bring the picture back to proper exposure post processing and no-one's the wiser.
PS...in case you see some older posts where someone has quoted "smc"....that was me. I changed my forum alias from smc about a year ago. I'm glade it's gone to someone else that enjoys shooting film! I went and shot a roll of back and white film yesterday and found myself trying to look for a screen on the back of the camera...
Cheers,
Steve.