Rick,

The Burgess Shale has long been on my 'to do' list, but I'm afraid that my days of hiking 7-10 miles over rough terrain have passed. There are a few other intriguing suggestions you made, notably Marble Canyon, Takakkaw Falls and Wapta Falls. These were not on either my or my wife's list, but look well worth visiting instead of revisiting places we've already been.

Thanks again,
AZBuck