Chains for outer dual is fine unless you are on an expedition then go double.
Fit them on before you go. Leave 2 or 3 extra links if you cut to size.
Lay the chain on a 2x4, drive up on the wood for easier install.
Practice with no extra tools and using ski gloves in your front yard before you go.
Use tensioners to keep them tight and prevent damage.
Now you are an expert.