I'd suggest the Nomad. It's a little more narrow and the sides and top can come off making it more or less a flatbed trailer. If you are going to try and go car free the Nomad would serve both goals very well. The nomad isn't much wider than your shoulders so you don't have to think about where it is. When riding on roads with narrow shoulders it's nice not having to move into traffic anymore than you have to.
As for extra weight and drag... it's about 14 ish pounds. Panniers and rack are going to be at least 5-8lbs.
Burley products are very well made and durable. While I love my trailer for shopping and hauling larger stuff it's not my first choice for touring. But, it would be my first choice if I could only have one option and was living car free.
The added drag is real but it's not horrible. Living car free almost requires a trailer if you don't want to be calling friends all the time to help you haul stuff that doesn't fit in a set of panniers.
Go Burley Nomad. My 2 cents.