Are the originals likely to pack up on me? It's only 4 days, thing is I'm taking a small rucksack with clothes etc in, not really wanting to take much in the way of tools. I take it relays are easy to get at?
Yes, they are easy to get at. Just take the seat off and you are looking at them. Will one fail if it's the OEM relay? Probably not, but maybe. It would only take a minute to put the new relays in.