Towing Std. Shift RWD Car - Unhook the driveshaft?

It all depends on which M/T you have. And unfortunately, none of the towing guides I've seen go back that far. Generally, the Mazda 5-speeds are ok for towing in Neutral, but Tremec and Borg Warner M/Ts generally have towing restrictions (speed and/or milaege). I have not idea who made the M/T in your car.

Also, a transmission that was originally approved for Neutral towing may not hold up as well after its old and worn out. I'd say pulling the driveline is the safe approach for any long distance towing.