Welcome to the forum and congratulations on your new trailer. There is lots of great advice from great folks on this forum so ask away. When you get your trailer get the dealer to show you everything..... even the little things, bring questions, and if you can, video the walk through. Towing a large trailer is a learning curve for sure, but the more you do it the better or more comfortable you'll get.
Good news, now you get to make a list of all the new goodies you need to buy for the new trailer...
As for the whitehawk models, we love our 28dsbh.