I have a Haulmark trailer very close to what you are considering. It has a 26' box (square front) and an 18" extended tongue. The length of the extended tongue needed is dependent on your MH turn radius when going forward or how good a driver you are when backing up.
I wish, in hindsight, I got a V nose instead of the square front and extended tongue. Going forward and turning it would be about the same. Backing up you can jack knife anything.
I don't have an additional back up camera and have never missed it.
My MH's have all had air leveling and I never had or considered a WDH. They've all been diesel pushers.
I also regret getting a 26' box. I should have gone with a 24' V-nosed Haulmark. I love the Haulmark. It's not so expensive I hate to see it sit on a storage lot but it's good enough to get me all around the country without a worry.