For a one day match, I will bring a spare bolt and a spare trigger on a hanger since you are running an Impact. I don't carry those with me in my pack, but they are in my car. I have seen more triggers fail than bolt components by a wide margin.
For a two day match, I may or may not bring a spare rifle in addition to those two items. Lugging two match rifles in and out of a hotel room is a pain.
Before I invested in either of those items, I would invest in a Fix it Sticks toque limiter set (URLs below to what I carry). That I do carry in my pack. I have seen more things come loose than I have seen break. I carry mine as much to help other shooters as to help myself. The second link is for a smaller torque limiter. I like that for ring cap screws. I use the larger limiter from the kit for bases and action screws.