I just did this and it was far easier than I expected. I borrowed a receiver from a room that doesn't get used much anymore. Bought the rest of the needed stuff like dish & tripod, signal finder, cable and compass. The hardest part was figuring out how to reset the receiver which is easy once you know how and I didn't need to phone the service provider. Dishpointer.com works great for elevation and azimuth. I'm only interested in HD from one satellite and don't need to worry about skew. I have the receiver permanently mounted inside and ran new RG6 & HDMI cables inside.
I would set it all up at your trailer while still at home and make sure you've got it figured out. Once the receiver is reset, it's just a case of pointing the dish in the right direction and fine tuning it. Am out camping for a couple of days and am using it at a CG for the first time - way cool. Can't get the satellite I want for HD due to trees in the way but got the other one for SD okay.
One thing I've found is that I don't get the same amount of SD or HD channels on the separate camping setup while testing at home that we do in our house despite aiming to the same satellites.
I did call our service provider to figure out how to get the sat. remote to operate the volume control on our Sansui TV and could not figure out how to do it. DW says she knows how and will do it when I'm back home.