The OP stated SD programming. Don't know why all the HD discussing.
I never have a problem w/ SD D-12 in the RV, on either the kingdome, or the dish on a tripod when trees bother. Just the basics, and simple as it gets.
I do sometimes have a problem getting the local (home) networks traded out for the campground area locals. This requires a call to DTV to get the temporary change out,.....problem mainly because of the ignorant people, most of which don't even know that you can do that. And some of the real stupid ones have even told me that FCC won't allow that. That's when you just hang up, and pray you'll get a civilized human on the 2nd call,....and sometimes it takes 3 calls !!