Badger, whether you can drop the tailgate depends on the tow vehicle, the hitch, and the trailer. I had an '09 Tundra with an Andersen WD hitch and a '97 Airstream 25' Excella and could not drop the tailgate without hitting the electric jack. This was a problem because I store my Honda generator
in the back of the truck, and it was difficult to lift out of the truck with the tailgate up. The answer was to contact Andersen and get a new 3" longer stinger for the Andersen hitch. Cost about $60, but it worked perfect.
I sold the Tundra and the Airstream, and now have an '06 Tundra, a Husky WD hitch, and a 21' Bigfoot
with a manual jack. With this setup, the stock stinger works perfect. No problems letting the tailgate down.