TJ with a TearDrop, absolutely the best combination.
Just finished a 1700km tour with mine. A 1500# trailer. 1500# and lighter is fabulous in the mountains. I also tow a work trailer that is 2100#, it can maintain 60mph but you might be down 3 gears and running 4800rpm in the mountains. But 1500# lets one hit 70mph passing trucks on a mountain 3 lane with ease.
For 500km I ran highway speeds averaging 100km/hr. I averaged 14mpg. Next 500km I ran averaged 85km/hr, Rarely passing, trying to never exceed 100km/hr. And I averaged 18mpg. Building my trailer, I never considered weight. It is sheeted in OSB, the heaviest choice. Also the cheapest, and once painted very stable too. And it is a BOX, zero consideration for aerodynamics.
heres my teardrop build
I started with my 5x10 utility trailer plus 4 sheets of 7/16 OSB which I used to carry chimney supplies. We demolished a housevwith the old plate glass sliding windows and I saved 2 pieces of glass which started the trailer process. I was sure the glass would eventually shatter, but 3 years...
www.expeditionportal.com