My dad and I had a sit down last season and we decided that we have to be realistic and he does not have too many hunting seasons left where he will be able to hunt some of the rougher turrain animals such as elk, moose, caribou, etc. So, it is our #1 goal to go on hunts for these animals while we still can together.Like you have all said, it is sad in a way to look at your dad's mortality, but it is an inevitable part of life and I look forward to all of the memories we will make in the meantime.