We have used merino wool (they might be blends, not sure) from Darn Tough, Smartwool and some Costco off brand (I want to say wigwam, but that might be wrong) for our summer and fall trips. I have stayed comfortable thru about 35 degrees F, though my boots have some amount of insulation. Most trips I only have one extra pair of socks along or maybe two at the most. I keep my "camp socks" dry at all costs, even if it means having to pull on socks that are still wet from the day before, but merino dries out pretty fast and keeps the stink to a minimum even for 7+ day trips.
I have Cabela's, Scheel's, Smartwool, and Sam's club off brand Omniwool. I can't tell a difference between any of them. I'll never wear cotton hunting again and see no need to spend $20/pair for the name brands.
Wigwams are good, made in Wisconsin. Darn Tough makes good stuff too, made in the northeast somewhere (CT maybe?). Smartwool is good too, but made overseas and more expensive than the first two listed made in USA.
The factory that makes Omniwool used to have the contract to make Smartwool medium hikers. Which explains why they are virtually identical to the older SW socks. I'm a big fan, especially given their price point.
I switched from smart wool to Fits socks and will not be changing. Not that i do as close to the backpacking many on here do i do wear mountaineering boots for majority of the year with 40 to 75 pounds on back in some extremely hot conditions and they have proven themselves time and time again