The kits that use a reamer, rubber cement, and lil gloopy rubber cords are far preferable to a “fix a flat” canned solution, both in effectiveness and in ease of replacement. A pair of pliers and a good utility knife would go along with this stuff well.
I keep a set of box wrenches (suitable for your car, metric or sae), screw drivers, channel locks, a high-vis vest, tire repair kit, tow strap, air compressor, and a pruning saw in the boot spare around the spare tire.