I prefer to handle them as gently as possible, so I use a net to keep them out of the rocks and sand. I’ve seen them thrash and beat themselves on the beach when someone lands them without a net, and it doesn’t look good for them at all--not to mention making it harder to release them gently. It's an opinion, but if we are supposed to wet our smooth, soft, hands before touching them to protect the slime coat I can only imagine that scraping them on rocks and sand and then letting them dash themselves on cobble is bad too, so to me it's worth it to carry a net.
I like the fishpond's mid-length boat net when wading. Not necessarily advocating spending fishpond prices, but the basket and handle size was what I was in the market for and fishpond was what I found easily. Basket is 25" x 16" if I recall correctly, and I think the handle is about 14". I don't like using anything with a smaller basket for salmons because here's what a salmon-sized rainbow looks like in the next basket-size down (I think it’s 12x18x12):
View attachment 90649
And here’s what a good-sized coho looks like in the mid-length boat (less bend in the fish):
View attachment 90651
Edit: Fixed a bunch of spacing issues.