1)  more and more campgrounds have bear-proof food lockers so
there will NOT be bear problems.  As they say: A Fed Bear Is A
Dead Bear.  If one wanders through camp and finds nothing it
might not come back.  If it does find something it will come back.

2)  there are "hard-sided campers only" campgrounds in Yellowstone
and maybe other places with grizzlies.  There was talk about this
last summer or sometime and I asked the person posting specifically
and he said he was told a Westy was NOT hard-sided when the top
was up.

3)  door handles:  The Colorado DOW has a bunch of suggestions
to keep bears out of houses.  One is "door knobs on outside doors"
not handles.  The bears don't know to open the handle per se but
"exploring" the door features sometimes leads to the door
opening.  It never does with a knob.  You can apply what you
want to the Westy sliding door handle.  :-)

4)  besides food, deal with garbage.  Garbage Kills Bears.
Richard