Sounds like more or less what I carry--breaker bar with appropriate sockets and extensions, bottle jack, and chocks. At least in my case, I need different sized sockets for the wheel simulators, the lug nuts, and the cable hoist thingy that holds my spare up underneath the motorhome.
I'd consider also a small air compressor if you don't have one. There's no need for a big tank--probably as much of a detriment as a help when occasionally inflating or topping up a tire--but it does of course need to be able to go above the tire pressure, and to pump some volume of air at those pressures. Most of the inexpensive 12V tire inflators are practically useless when up against a motorhome tire needing any significant amount of air. (I have a nice little Fini AirBoss, which is compact and effective and comparatively quiet--which is to say it is only pretty loud, but not quite super earsplittingly crazy loud.)
Assuming your '99 Santara is on the E-SuperDuty chassis, wheel chocks are vitally important. The parking brake on this chassis is a driveshaft brake, and so provides no holding power whenever one of the rear wheels is raised above the ground (as the differential allows the other wheel to turn freely). They are important in any case, of course, but even more so here than on other vehicles that have the parking brake applied to the wheels.