Great thread.
MJ, I am going to build me an oil catcher w hose like you made. Not only will it get all the oil\sludge\crap out, it will be cheaper than buying a pump!
For aligning up the trailer hitch to the trailer, I had bought alignment poles like these:
http://www.amazon.com/Reese-Towpower...m_cr_pr_sims_t
I think I have also seen them at auto zone or walmart. Save's me getting in and out of the truck to see if its aligned, or even better yet: trying to understand directions from my wife.
Even without these, I would opt to do it by myself.
rkc