I don’t have any direct experience but I’m VERY excited about the possibilities! If I could look over your shoulder and read about your adventures as you travel it would be awesome. I found out about SDR through one of Cory Doctorow’s fiction books and also though some P2P mesh networking groups I’m a part of, and as a solution for wirecutting away from the evil Comcast and co it’s really one of the few viable techs available. I can’t wait to hear how you go!!
What about SDR are you interested in?
There are several flavors of SDR. Are you interested in 2 way communication? Ham Radio?
Just listening online?
I play around with this stuff, and am happy to try to help.