Thanks to Alancw3 who already had posted information about this in several other forums.
MTBaddict, if you are going to be bringing a bike by car you should not have a problem finding parking, especially given it is Sunday. Just give yourself a few extra minutes to find parking. Look at the map linked from the Harris Cyclery page.
There is a small parking lot 1.5 blocks west of the memorial site on the south side of the street. That may fill up. You should also be able to find parking on many streets in the neighborhood immediately to the north of Washington street.