Use a weight distribution hitch or not?

I think you are on the right track. While the Equal-i-zer is a great product, in your case the much lighter Andersen will fit your situation much better. I am now using it and I love it because of it's light weight and ease of use. No matter what many people will say, you do not need to worry too much about sway. A 16' trailer just won't have that much of a problem. What you do need to worry about is leveling out the Caravan and keeping the weight on the front axle. The Andersen is going to do that just fine with that small of trailer. Let us know what you decide. :)