Well, this is a hell of a lot more expensive than a pop up tent, but the Wikiup 3 is very highly regarded in ultralight backpacking circles:
They are very stable in strong winds. It is also a lot lighter and a lot easier to take down compared to a pop up tent. Good materials as well. However, there is a lot to be said for a simple tarp:
This one was made by myself with silnylon from Extremtextil:
There are plenty of instructions on how to sew a tarp on the internet; the xyl may be able to help you get to grips with a sewing machine. If that fails, you can buy one ready-made on the internet cheap as chips. I used one today on the Braunhuberkogel in moderate rain and it worked fine. With strong winds you’ll need to get in the lee of the hill, but you can lower them to ground on one side to keep the wind out. They weigh about 300g, which is a considerable improvement on 6kg. An extra piece of silnylon serves as a groundsheet, but if you use a groundchair (something that I find invaluable as an activator), you won’t really need a full groundsheet:
Whatever you choose, it shouldn’t really weigh more than 2kg in this day and age, and it needn’t cost the earth either. Having been in stout 4 season tents that have been blown flat, I think you’ll be in trouble if someone so much as sneezes near a pop up tent! Not my first choice for mountain top wind protection. Believe it or not, when I was in the scouts a cow actually pulled our tent down after getting it’s foot caught in the guyline; hopefully you won’t have to face anything like that at 4 in the morning. Be prepared…
73 de OE6FEG / M0FEU
Matthew Pullan