I have 2 bikes, both set up as singlespeeds--a Kona Unit 29'r MTB and a Surly Cross Check. I pretty much rely on my LBS for all my repairs, etc. though I'm gradually learning basic stuff.
My question is, I'm starting to take longer and longer rides, and have an overnighter coming up and hope to do more of that, so I'm guessing it would be good to be able to fix a busted chain by myself if I had to.
From my measurements it appears the MTB (Kona Unit) has a 1/8" chain, while the Cross Check has a 3/32".
My multitool has no chain tool of any kind, but my research suggests I might not even need one - just have some spare links on hand, is that correct? If so....

For the 1/8" I found this: https://www.amazon.com/KMC-Z410NP-Co.../dp/B004JKJLU2

For the 3/32" I'm unclear on what to get. Would it be this?: KMC Missinglink - 10 Speed, Single Link > Components > Drivetrain > Master Links & Pins | Jenson USA

Am I on the right track here? Any advice appreciated!