How much space do you have between the tire and the trailer wall.
... Are you going to paint it to match your hummer?
What fenders are you going with?
I think you should build some full width fenders for the trailer.
It looks good except for the spacers.
If you use full width, you will have a cook top too and less slop from the trail.
Just my two cents.
So what kind of magical Hummer parking lot is this?!