If you want to go into possible trail fixes, a spare tie rod would have to be about the highest priority (along with the tools to trail-swap one) followed by either a CV boot kit or something to trail-patch one. You can go as far as ball joints or an axle. By the time you get to the ball joints or axles, and all the tools it'd take to trail fix them, you're getting space prohibitive - and who else knows what else you'd need before them...