Theres some good reads around, bearbones website, the bikepacking thread on STW etc.
Personally I'd also go with a tent, unless you're wedded to the open air theme, they can easily be the lighter option (eg zeph 2). If the weather suits, you can always open the fly for the view. Last year I overnighted at afan, Welsh midges ate me alive, i was bloody glad to get inside a something with a mesh.
Thanks for the advice. What's STW?