Trailers slow you down a lot. Factor that in to your desires.
An empty trailer isn't bad, and carrying lots of weight on the bike
isn't bad, but the combination of wind resistance from the trailer
and from the weight it carries tips the impression over the top that
you're really being slowed down.
So if you need gear, put a milk crate on a sturdy rear luggage rack
and do it that way. (I recommend a conventional rack with legs
PLUS the core innards of a seat-post rack under it, so it's stabilized
as firmly to the frame as possible; the latter prevents sway and the
former bears the weight.)
I have a no-longer-made Tanjor trailer, which is streamlined as much
as possible, and it lets me ride with one higher gear than my boxy
Burley, from reduced wind drag; but it's still slower than no trailer
when empty.
Keeping all the tires pumped up hard helps a lot, reducing some drag
that you normally put up with in compensation.
--
Ron Hardin
On the internet, nobody knows you're a jerk.