I agree with Joe. You'd probably want a distribution block (in a panel or screwed to something permanent. Run the positive to one end and more fuse receptacles than you need right now. One separate lug for all the negatives to connect to. They're all common and run back to the negative, and ultimately to the battery negative post. You want the fuse in the positive lines not the negative.
I've seen fuses out there (the blade fuses) that light
up when they're blown. I'm of two minds about them but I'm using them on a trial basis. The theory being that's it's quicker to spot a blown fuse.
Alternatively, you can put in-line fuses in all the individual positive lines to your accessories but then it's hunting for all the positive lines to check the fuses. It's mostly a convenience to have them all in one spot.
Generally, the converter, which runs off of a/c current, should have it's own circuit breaker. RV panels usually have both some a/c breakers and a number of dc fuses all in one spot. But again, you could put the a/c breaker for the converter in it's own spot somewhere but I would suggest you have a breaker in there somewhere. Plus another breaker to protect any a/c receptacles. If you have a microwave
or air conditioner I don't think it's a bad idea if they're on their own line with their own breaker.
I wouldn't want to depend on the a/c breaker on the post to protect the a/c equipment in my trailer. Your tolerance for risk may be different from mine but you did ask for opinions.