Thanks to all for the responses and thanks, Jim, for the PMs. We are going to err on the side of caution and bypass SD this time around. We will probably incorporate the Mt. Rushmore area into an early fall trip we want to take along the top pf the U.S. (maybe go into Canada to go above the Great Lakes) then on to the New England states. DW and I lived in New Jersey the first 19 years of our lives but have never been to New England - definitely on or list of do's.
BTW, I realize that the majority of folks enjoying the motorcycle hobby/lifestyle are regular folks and do not fit into the common stereotype of "Biker". However, it's been my experience that some of the younger folks seem to have purchased an attitude along with their Harley. I guess I'm just too old to deal with that anymore - better to steer clear. As stated, the area will be much less crowded after the rally and after everyone's kids are back in school.