Well shucks. I just typed on a long reply and hit post and it crapped out on me. Bottom line - y'all have given me some great insight on what to watch for and reminded me that I need to get the dash brake light indicator working - it went dead not long after installation.
I have pulled this Nissan Frontier about 15,000 miles and have never had the smell before. I ran a 6% 4 mile grade today and didn't smell anything and the rotor temps were in the 90 degrees area when I stopped about 10 miles later. I did have new pads and rotors installed before the trip and maybe I was pushing too hard yesterday. But I'll keep an eye on it and make adjustments when I get home in a few weeks. Scott - love the turnbuckle idea! Thanks again for the help!