"Also, what do you think generally of my plan?"
Newlyn1,
I'm a fan of carrying my 110 shells, a small Gatorade and nothing else. But I use a 3 pocket bird-bag or so-called, half-vest so the weight is suspended from my hips, not my shoulders....less fatiguing (I started out loading 110 shells in the pockets of a full-length vest)and less hindrance to my shooting. They can be had for as little as $30. I walk a little funny for the first 1/4 of the course, but it gets better as I go!
I suspect you won't like shooting with 10 lbs hanging from one shoulder and will gravitate towards removing it putting it back on after shooting. So, you won't be any further ahead than with a range bag and it may turn out to be an even greater nuisance.
