All that light coming off your dash is going to be a handicap if you're pulling long nights on dark roads with deer and bears loitering around!
I know it looks cool.. just saying function over form here. I tried LEDs there too and went immediately back to incandescents except the backlighting.
For the platform in back, if it's of any inspiration I used sand ladders to build a platform and Ikea boxes under it as drawers - the whole mess weighs less than 25lb, sleeps very comfortably and serves a second purpose by keeping the sand ladders secure from sun damage and casual theft.
Keeping it all feather light and streamlined means better mpg which means longer range and less driver fatigue. It doesn't look as extreme for the 'grams which may or may not matter depending on one's priorities.
Have you got your timing belt sorted?