Just a follow-up. I completed my 140 mile ride on Saturday. We had cold, headwinds, heat, rain, clouds, sun, but no locust. Overall it was a great ride, but a very long day in the saddle.
I used Assos Chamois cream at the beginning, Chamois Butt'r at 50 miles, 72 & Assos Chamois cream at 102. I was doing OK until I hit the 118 mile mark. Then it got warm and I can feel my saddles sores starting to bother me. It's Monday and I'm still pretty sore. I used the Specialized Power Expert saddle and I have loved it; however, I think it might be time to experiment with a different saddle. I ordered a Selle Italia SLR Supermax with ti rails. I'll see if a new saddle makes any difference.
Thanks for your advice in this thread.