I used to drive regularly between Los Angeles and San Francisco in my 1600, a much simpler car than a tii. But, I never traveled without a toolbox and a good tool set with all the ratchets, wrenches, etc. I also lugged around a small hydraulic jack.
As far as spare parts, I had a spare water pump, spare fuel pump or rebuild kit for one, spark plugs, a few extra plug wires, distributor cap, a few distributor rotors, spare ignition points, spare ignition switch, about 3ft of fuel line, test lamp, jets for carb, gaskets for carb, light bulbs, electrical wire, can of carb cleaner, small can of WD 40, a tire pump, tire gauge, hand cleaner, flash light and work lamp and probably some other things I didn't mention.
Most of the time my trips were free of mechanical breakdowns or problems. But, on a few occasions, I ran into serious problems such as the time when my oil pump failed 50 miles from the nearest small town. After getting towed to that town I borrowed a car from a relative and drove another 50 miles to Gilroy, the Garlic Capital, where an 02 friend with a junkyard in his backyard allowed me to remove a gear type oil pump from one of the many 1600 motors he had sitting around. I spent that night installing it in 35 degree temp. That's not an easy job as you have to unbolt the engine mounts and transmission mount, remove the distributor, lift the engine and remove the pan. I finished the job at about 1:00AM. And, it was a very satisfying experiences.
My oil pump failed because I was unaware I left my car in 3rd gear after getting back on the highway from a rest stop. My tachometer stopped working and I had the window rolled down slightly. There was a lot of noise , and I lost my situational awareness. My girlfriend was with me, so I was also probably distracted. I must have been driving for 50 miles at 6,000rpm when the oil lamp came on. I immediately shut down the motor and coasted to a stop.
Without my tools I couldn't have done the job. But,I still needed to borrow car ramps from a relative in that small town.