Towing my '81 13' Casita
w/ a 2002 Civic EX Coupe.
Couple significant points that help:
We WILL be adding brakes to the Casita
. (Just picked it up last weekend.)
We have a MANUAL Transmission, so not the same concerns there as automatic as far as overloading the trans, overheating it, etc.
The EX Model of this year Civic (at least the coupe) w/ the manual trans. has shorter gearing (higher revs at a given speed), so it's got more oomph up hills.
We did OK up some pretty steep/long hills, but had to drop it down to 4th for those. Put about 100 miles on this weekend bringing the Casita
to where we were tent camping from the prev. owner, and then home from there. Only issue was a fair amount of bucking from rear suspension over certain bump scenarios. (Not uncommon on WI roadsaccording to RV magazine I read!) I also suspect a higher hitch ball (in the works) and or new shocks (Current ones are getting worn) may help.
On the interstate, had it up to 70, but we cruised around 64-65.
Best guess so far is that MPG went from 35-36 Hwy to about 27 w/ the trailer.