troutfisher13111, TOMBSTONE has done you a good one there.
Even if you don't buy from there it makes it really easy to compare weights between silnylon and regular coated ripstop. For example look at 10*10: 32oz vs 18oz.
True, 10*10 is big, and you could likely get away with less. I can easily get two people under one of my 10*10 and still cook happily. And that isn't just two people laying there like sardines either, on a single overnight. That's two people cooperating under that and not pissing each other off for a bunch longer than that waiting for the weather to clear up.
Sure, you could scoot over to Amazon and snag up a 10*7 silnylon jobbie - Packed size: 12 x 5 x 1.5 inch. Compressed: 4.5 x 3.5 x 3.5 inch, and I'm sure it could work well. I've used that kind of size a lot myself. But that bit of extra size offers you so much more. In the old days fabrics were so heavy that one would recover weight wherever possible, likewise packed size. And those few feet made a huge difference. If you could recover some by pruning and / or using longer lines and not pegging down tight, the temptation was often too much to resist.
I've no idea what the weather is like where you go, but if it is at all likely to be bad then I'd strongly urge you to spend a few more quid and get something bigger in silnylon. There are way too many videos and photos floating about with people doing simple overnights with a bit of bath towel sized fabric. That's splendid if you just have vertical rain from a sheep cloud in cartoon land. Blowing a gail in grotty conditions and man would they struggle. Of course they don't show you photos or video of that, 'cos they stayed at home. The way out of that is to really hunker down under ya scrawny bit of fabric. That works, been there, done that, more times than I can remember, but as a sage man once said; any fool can be uncomfortable.
Before you decide to spend strongly consider:
1] For the same packed size and weight you can a have something much bigger in silnylon.
2] What are you dependent on to pitch effectively? Trees? Rocky bits that are just right? Do you need to mess about finding twigs?
3] How weather tight are the options you are considering really? It's easy to go all ego about how you'd be fine with something smaller 'cos you are
well you. Strip that by framing as a problem when you are not you, or not you at your best...knackered, battered, mebe a bit broken off. What would you want over a family member in inclement weather, a poncho sized thing flapping up high between two twigs or something more?
4] Rain alone does not count as tough conditions.
5] Most survival courses and instructors you see on the interwebz need a squirting with the diarrhoea crowd control device. It is fully congruent with what they are peddling. Fact.
Just for ref look at the below. Decent sized tarp and a bit of origami skill gets that up with a single pole. Imagine you are in that with your pack and whatever salvage pulled in behind you blocking the door. Do you want to be in that in a sideways driving hail storm or under something lower?
