In reply to Dave:
I usually double up the small wires (up to 7) then a single set of the bigger ones. Double cams from gold to small blue, then a few micro cams but generally haven’t placed too many of them up to E3. I usually carry 14 quickdraws but 12 would be enough as well I think, a few 120cm slings for spikes, belays, last gasp quickdraws etc.
100m rope and lots of protectors, we wrecked one in about 4 days last year, such is the roughness of the rock. You won’t be able to protect every rough patch but getting the main points gives peace of mind at least. Worth taking a 50m for the shorter cliffs. Agreed about stashing, for Guarsay Mor you’ll need a 50m and 100m to get to the base of Upper Cobweb anyways, so they can both be stashed and then you can use the 50m for trips to the Boulevard and Guarsay Beag.
Keep them in a rope bag/dry bag whilst on the Boy James, there’s a good chance there might be diesel lying around in the water and you don’t want that stuff anywhere near!