As long as this protest remains "and alternative" and is NOT going to be about denouncement of the other march and/or Kokesh, then I'd switch over to this one. Basically, "We don't agree with their chosen method but we can empathize with the reasons they feel they needed to do something." I really like Skidmark's suggestion. It's well thought out and seems like it could be effective.
* My transportation and housing is already planned with a buddy so me switching over for a protest on the same day would be logistically easy for me.