Sorry, don't know enough to answer your "underside dew" question.
I too was woefully unprepared for my first trial hang - but that's how we learn.
Just wanted to congratulate you on your first hang and having the 'smarts' to do that in your backyard! Welcome to HF!
"Climb the mountains and get their good tidings.
Nature's peace will flow into you as sunshine flows into trees.
The winds will blow their own freshness into you, and the storms their energy,
while cares will drop away from you like the leaves of Autumn."
— John Muir