One way to conserve 12 v battery power is to use low amp LED's, instead of typical 12 RV or automotive bulbs. I found this one that can be easily adapted to most applications.
1156-PCB-W24 LED Lamp
http://www.superbrightleds.com/other_bulbs.htm
I think I will get one. It only draws 85 m Amps if the specs are right! Compare that to the typical 12 v automotive dome light.
Is anyone else using LED applications in the tear system?
Let me know if you try it. How do you plan on using it in your tiny trailer.
DEE BEE