Anone have any real world temp rating for a Snugpak Merlin please? I know you can add +5 to what Snugpak claim, I used to own a Kestrel and it was way under what they claimed. Got a weekend forest hammock trip this weekend, min night temp is 13. working out which bag to take. Got hold of a merlin for summer, I also have a Vango venom 400 which is toasty but don't want to wreck it as there will be fires and drinking, etc! it's a festival. Was thinking of getting away with the Merlin, a roll mat and my Alpkit bivi bag. Appreciate opinions. Thanks