Very nice rig!
Wonder if you could take the same approach but using a Ladder rack instead? Then you could hang two hammocks side by side and rig up a tarp (cheap large wally world one) with relative ease.
Something along these lines http://www.myladderracks.com/product...categoryID=461
They can be found cheaper, I just had this site bookmarked.
Formerly known as "Cranky Bear"....
"yesterday is history, tomorrow is a mystery, but today is a gift---thats why its called a present" - Master Oogway
It's always best if your an early riser!
I like hiking as it's like exercise!