If I were you since you have already invested in the generators, I would simply go for a nice powerful multistage converter. If you have only 2 golfcart batteries, there is not much point in a converter over 60 amps. A single generator would be all you need.
I have 2 golf carts and a 45 amp PD 9100 series converter. I use the lights and furnace liberally, as well as using a small inverter to charge my electronics. I find that 4 hours of my Honda 2000 generator time is plenty per day. I could probably even run it less than that and get by. My camping trips are usually 3-4 days. 2 golf carts, a generator and a nice converter is a great setup, may not even need solar. If you can plug into shore power every week or other week then there is no worries at all about not fully charging the batteries consistently.
