Some of the drycamping battery charging people on here are very intense. They will have you spending $5,000 by the time they are done.
Your converter is fine. Four gauge or bigger wiring is a very good thing.
A second battery in parallel would be a very good idea but not mandatory.
Your Champion is fine.
I imagine a lot of those tent campers will be happy with you running the generator if you will let them charge their phones.
Here is what we have been doing;
We have a pair of 12v gel deep cycle batteries.
We have LED lights and are somewhat conservative with power use.
We charge with a WFCO 8725P. That's right, 25 amp output.
We run the generator twice per day. Once in the morning to make coffee. Once in late afternoon to make coffee again. I know, there are other ways to make coffee!
About every second or third day we will allow the generator to run for an extra 30 minutes after coffee is done.
We can camp with this method virtually continuously.
You may need a little more generator time based on your power use but not all day. Get a volt meter and check the battery voltage every morning with no load and before running the generator. Do not run the battery below 50%.
