Slow, most tow vehicles are 5' wide or more. Measure the width of your tow vehicle. Then, subtract 6' (the width of your proposed wild goose build) from your tow vehicle width. Divide the remaining 1 to 2 feet by two. That's how much of your trailer will stick out past the tow vehicle on each side. If you have a problem, you can always add side mirror extensions to your tow vehicle. A lot of people tow 6' wide trailers. They just aren't usually teardrops.
Are you planning on having your new teardrop done in time for your honeymoon?