Trailer should be slightly nose down, so that sounds right. The bars may be a little off parallel, as long as it's not a lot. You did the truck fender measurement set up right? Easy to find, but here it is quickly; measure trucks front fender from the ground unhitched, then hitch up, and adjust the bars until the front is 1" higher than when unhitched. NEVER lower than the unhitched distance. That should get you close. I'm sure others can add advise as well. Good luck. It sounds like you're on the right track. I would expect it to feel bumpy I've RR tracks.