That's fair enough - it's great you've found something that works for you.
Just to bring up a few points - most decent packs have built in rain covers which makes it easy to put down even in the messiest of weather (unless you are wading). I also hang my pack under my full size tripod for extra stability. I can easily slide mine across and wear it across my front and access everything I need from the top (assuming the camera is mounted to the tripod already).
I'll usually carry a few double darks in my jacket in cooler weather when out an about. With the camera mounted to the tripod all that I need access to is a loupe, meter and dark cloth which is easy to get out of a pack.
In the end it boils down to what suits the individual the best. My pack is designed to be worn long distances hiking and I've never found it uncomfortable at all (though I am probably a fair bit younger than a lot on this forum).