I think the generators will self regulate, assuming they are under similiar situations with just the diode method
if one has more load than the restt because of a voltage drop, assuming the generator has the same power applied it will slow down due to the load and balance out with the others
kinda like how a generator for 120v mains would work, so long as the voltage and frequency match close enough it will be forced into sync, the few percent that it is off is corrected naturally by the larger network forcing it to match and follow the path of least resistance (matching voltage and frequency exactly)