I am not saying that it wouldn't be a good idea to go longer than what I have. You should be good for up to 7500-8k gross. I would definitely consider a 27' class too. I am just saying that if you find an ultra light that is a 30' class, you might want to think twice.
The biggest thing for a good handling, safe trailer set up is doing your homework. Make sure you load the trailer correctly. Make sure you weigh the trailer fully loaded on a truck scale (if possible). Many of the WDH components are based on tongue weight, so you want to know what it weighs after you get it loaded to ensure your components are properly selected.
In principle, a WDH is nothing more than an added suspension component. If it is too big or small, it may not perform as it should. Or worse, lead to unpredictable handling.
