Average car is about 16.4 feet long.
5,280 feet in a statute mile.
Gives you about 322 cars bumper to bumper per mile. Call it 300 for gaps and road crossings etc.
That's 2400 cars in a single lane. If that's a 4 lane then you are talking 9600 Cars for 8 miles and I am willing to bet at least two people per car and that is just the people stuck in traffic.
19200 peeps stuck on the road waiting to get in which means there was already people at the destination. Easily 20,000 people if the 8 mile traffic jam is credible.
That is a good estimate. It would be impossible to get a single picture of the total attendance because of all the “Old white folks”. I’m an OWG and I could only stay about an hour. As I was leaving, there was still a strong flow of new comers. I could only park 1 mile down the road (knowing my walking limits) so I decided to triple park in front of several other cars off the side. When I returned to my car, the people were waiting to leave also and were very friendly about it. How great it is to walk among so many good people and Patriots that only want what is best for our country. The country that I fought for in VN. Sorta takes the edge off of my disappointment.