I wear Skecher tennis shoes with memory foam. They have proven to be the most comfortable tennis shoe for the parks. If you want a sandal type shoe, I go with Alegria. They are very expensive but worth every single penny. They conform to your foot and give support.
I'm glad that this is being done. No matter what your politics are, all Presidents need to be included. I look forward to seeing this when we are there in a few weeks. Thanks for the update!