Because no-one else has pitched it yet, I'll throw in a vote for the OzHitch. I love ours. It's Fan-Tas-Tic. Easy to hitch up in any condition, works beautifully, just a good thing.
I've heard a few people now not happy with their Alko hitches. I'm sure a lot of owners love them, but if I wanted a standard 50mm ball coupling, I'd go the tried-and-true Hyland hitch. They're not without their concerns, but I'd not hesitate to have one.
Norm is on the forum here, he might do you a discount if you drop him a PM and ask
http://ozhitch.com/Now, as to whether you need one or not - possibly not. But it's cheap insurance. And if you're going to bother about replacing the camper's hitch for something like a Hyland, you may as well go to a full-offroad articulating hitch and not worry. That's my theory anyway. So long as you've got a HR-style removable-receiver towbar, you can keep a second tongue with a 50mm ball coupling for when you need to borrow a trailer.
This is MySwag - everyone NEEDS a hitch that can articulate through 720-degrees, and 6 pairs of MaxTrax.
Good luck!
Matto