I have been wanting a light weight 4 season tent for a while. I go hiking backcountry solo often, as I can't find anyone that wants to go where and when I do (or more likely that wants to put up with me), and as I'm solo I need the lightest possible 4 season tent for a single person plus gear. I recently purchased a Macpac Alpine Cocoon bivvy bag, which is very light. But I'm not sure if I want to try and deal with using it in a blizzard, not being able to put my clothing and gear inside with me out of the storm, not being able to cook in a vestibule, etc. I was considering the Macpac Summit (1.8KG in use/2.0KG total) as my preferred option so far... Macpac Summit ...though it doesn't seem to have a fully enclosed vestibule. But, some of the Black Diamond 4 season options seem suitable and lighter as well... Lighthouse (1.45KG Tent and Poles, 1.74KG As Packaged, optional vestibule extra weight?)... http://www.bdel.com/gear/lighthouse.php Firstlight (1.22KG Tent and Poles, 1.55KG As Packaged, optional vestibule extra weight?)... http://www.bdel.com/gear/firstlight.php Highlight (1.18KG Tent and Poles, 1.42KG As Packaged, optional vestibule extra weight?)... http://www.bdel.com/gear/hilight.php Oneshot (1.04KG Tent and Poles, 1.28KG As Packaged, no vestibule)... http://www.bdel.com/gear/oneshot.php Anyone else looked into lightweight 4 season tents, and come up with other options? Any opinions on the Macpac Summit, and how it performs, both in the snow, and in the other 3 seasons? Any opinions on the Black Diamond light weight 4 season tents, and how they perform, both in the snow, and in the other 3 seasons? Are there any issues with a single wall tent that I should be concerned about, can they handle wet/rain type conditions as well as dry snow conditions OK, etc.?