Everytime I misplace my keys I wonder if it is happening to me.
I will be 60 in April and plan on doing my second DALMAC tour in Aug. http://www.biketcba.org/DALMAC/dframe.html
You sound awesome. and I can really relate to your self doubts. We are both that way (Dh and I) his mother's got it too!!
good luck with your parents. getting old can be really tough.