Thanks for the late advice...I'm sure I'll have other opportunities to apply wisdom to road rash!
How did it turn out?
Today - nearly 3 weeks later - it's totally healed. The injury actually healed quickly. The allergic reaction took nearly two weeks to heal and even spread to other parts of my body...including the same places on the other leg!
What finally got me over the top on the itchy rash?
Well, besides removing the allergen (bacitracin and the bandage adhesives), I used:
Coal Tar Shampoo...Yep, I got high concentration coal tar shampoo - the kind that's used for dandruff and seborrheic dematitis - applied it straight to the allergic rash with a Q-Tip for about 10 minutes at a time (avoiding the new skin at first). This caused an effoliation that really relieved the itching and scaling and gave me relief almost immediately.
For the future, I'm going to have a couple of tubes of brave soldier on hand. In reviewing the ingredients, the base of tea tree oil (which definitely helped me in this one) makes be willing to drop a few $ in preparation for the next incident.
If you don't grow where you're planted, you'll never BLOOM - Will Rogers