Making hooklinks on the bank, in the dark by the light of a headtorch, isn't the easiest thing to do! So much so that I've packed an LED light to put on my camera tripod for my next session. It'll only be needed if I run out of the spares I'll be making at home!
Years ago I bought a spool of Mason Hard Type Nylon to make leaders when I was fly-fishing for pike. Leaders, not tippets, the flies were attached to wire which was attached to the leader. It's strange stuff. Very tough, very stiff, and very 'coily'. It's also difficult to get hold of in the UK. Mine came from Veal's, and while they still have it listed on their website it is currently out of stock and has been for some time. There must be an alternative but buying unseen could lead to a lot of money going down teh plug hole. Is the stuff carp anglers use for Ronni Rigs the same?
Other than the nylon everything else is simple. One hook, two double barrel crimps, a rig sleeve.