Not to be flippant, but I would be sure everything is in working order.
As for what to take along, some say take enough parts and tools to be ready for anything. Some say don't bother either because they have faith in the car or they never seem to have the part/tool they need.
I like to be prepared so I tend to take a lot. I have fixed problems along the road more times than I can remember and have often been able to help another LBC driver get going again. I take --
Complete ignition system (coil, dizzy, plugs, wires)
Electric fuel pump & fuel line
Mechanical fuel pump
Water pump
Water pump pulley-puller
Generator (with pulley mounted)
Voltage regulator
Fan belt and complete set of hoses
Hose clamps
Sheets of gasket material (cork and paper)
Spare taillight bulb
Oil
More oil
Brake fluid
Starting fluid
Conatiner of Alumaseal
Tubes of Hylomar, JB Weld & form-a-gasket
The usual tools (1/4 & 1/2 socket sets, wrenches, pliers, screwdrivers, etc.)
Clamping hose pliers (2)
Flashlight
Tow strap
4 feet of nylon rope
Multimeters, digital & analog
Tape, electrical & duct
Assorted wire including a long jumper wire w/aligator clips
Mechanix gloves
Rubber gloves (several pairs)
That's what comes to mind w/o looking in the boot. Helps to have a luggage rack for the suitcase.
Obviously for shorter drives (within 100 miles of home) I take much less as I could have it towed home rather than attempt replacing the water pump along the road for example.