After checking with the organizers, it was discovered that it is NOT true that you will receive backstage passes to Rezfest. This was never offered by the organization. Sorry for any inconvenience or confusion caused.
Get there early and help out the bands set up their equipment and get a free backstage pass. Work for your ticket. That is how I used to go see a concert back in the day, and I got to see it from backstage. I now feel much more comfortable backstage than out front in that sea of people at most good concerts. My position was called a "Loader". I would do all the grunt work. Had to break into show business somehow!