Watch the run times for 12 volt systems. Deep cycle batteries should only be drawn down to about 50%, maybe 40% for a sealed battery. One of the 12 volt systems, I don't remember which, was using 90% of the battery to get their 1 hour run time.
And how long will you need to run your generator to recharge that battery?
I like the small generator as part of a modular system. The 110 volt hooka is the cheapest choice and the generator can be used for other things aboard or ashore. Just watch the fumes!