I carry a flash light, a hydraulic jack, a tire iron, a test light, phillips screw driver, flat head screw driver, vise grips, a 3/8 ratchet set w/ 1/4 inch adapter and sockets, a couple 3 inch extensions, spark plug socket, and a swivel.
Walmart sells a jack in a plastic molded case...Duralast makes a decent tool set...plus they have a lifetime warranty.
As long as your tires and fluid levels are OK you should be fine.
I've been through some wild stuff. My clutch quadrant broke at the SC GA line, I drove it back to Maryland with no clutch. My AC line blew one year at Mustang Week and I fixed it at the local Advance Auto and kept rolling. The throttle cable broke in VA and I drove my car with shoe strings tied to the throttle body.
You should be fine. Its better this year because it'll be cooler in September. 100 degree days can be hard on an old
car.