For a Shimano 1×11 drivetrain is it the usual chainring to largest cog + one full link? The Park Tools page about setting up a drivetrain mentions that SRAM 1x needs two extra links. This is on a FS (Salsa Spearfish) with a KMC chain.

It’s the usual measure twice (or three times), cut once.

I’ve got sram on one bike and Shimano on the other. I go with that method for both.

Just bear in mind chain growth with a rear sus set up.

Cheers Ian, I've always gone with the indicated method but I've only done it on hardtails or rigid bikes so wasn't sure regarding full suss. I've since found this video - https://youtu.be/D8nk50i8J6k from Park's website where they use the large + large + 1" on a Spearfish so happy to go with that.

Just got the steerer to cut down and put in the star nut and top cap and shorten the brake hoses now. I'll let my friendly mechanic sort the latter out as he's got the kit.

The other option is to fully compress the suspension then put the chain on the smallest cog combination. Shorten chain so as it clears the derailleur

BigdummySteve wrote:The other option is to fully compress the suspension then put the chain on the smallest cog combination. Shorten chain so as it clears the derailleur

Largest?

No different way of doing it, on my Fargo you can alter the effective chainstay length. If you set the chain length with the longest wheel base then moved it forward the derailleur would fold up and the chain would rub on the top jockey wheel.
What your doing is setting the chain length at the longest length which your mech will cope with, you might be able to shorten this depending on cassette range but won’t be able to go any longer,