I have a desert hike coming up in August. At the lower elevations I expect the low temps to be in the 70s at higher elevations maybe low 50s. Has anyone used a down blanket for this? I currently have a 10 degree down quilt, a 40 degree synthetic quilt that my son will use on this trip and a 20 degree synthetic bag. I have considered a 40-50 degree quilt but not sure it will get much use as I try to camp when it is cooler. I really do not want to buy a chinese blanket off Amazon but I do not see any options short of a down quilt. My costco does not have the down blankets in stock. I will be climbing quite a bit of elevation so I want to be under 16oz for the quilt/blanket/bag. Any other sub 16oz options, I may just bite the bullet and buy another quilt, I just have a hard time doing it if I do not have a use for it in the future.