Camping World's solution when they replaced my back wall.... was...... wait for it.....
yes, more silicone caulk!
They put a nice bead around the lens after everything was tightened down and in place. So far so good, & it will likely last a long while....but some day it will either fail or I'll have to change a bulb.... then I guess I'll be working up a sweat to remove the silicone residue....
I'm not too concerned for the short term, but my plan is to install a rain gutter over the lights
AND
consider replacing the fixture with those that FW28Z found and linked to here someplace, that had a proper fixture back that could be semi-permanently sealed & installed while leaving the lense removable for bulb access.
I'm still kicking myself!
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