How Do I Charge, and Maintain 2 New 6 Volt Batteries???

You are going to be running that Honda for hours and hours since you don't have a charger with many amps. For this trip, just make sure you have gas for the Honda! Next trip, or when it works for you, you can get a better charging set up.

For example here is a graph of the times it takes to charge 220AH worth of batteries from 50% to 90% using different amounts of amp size smart charger