I don't think so. At other serpent mounds they have found very few artifacts. They didn't carry plastic water bottles and littler the country side when they were empty. 
Dear Thundley,
For hundreds of years this is what we thought of the builders of the Pyramids in Egypt. We had no idea how or who built the darn things and could only guess at the reasons for them, some believe they were tombs but as the Vally of the Kings came about, now the Grand Pyramid with no Hieroglyphics's and all the strange doors that lead no where, we began to look further afield and have found the sites we believe the workers lived at to eat and sleep, during the construction.
My question is was the Grand Pyramid built first and the others an attempt to copy it????
The Serpent Mound itself may not hold any finds, it is the area that the builders lived in that will tell the story.
True the builders did not carry plastic water jugs but they may have carted clay pots filled with water to the site, or even have dug a well close enough to the site to perhaps supply temporary home sites for the workers.
I laugh at the idea that the woman built the mound, they may have gone to the sites to cook and nurse their baby's, till and plant a few acres of food, but who would be left to construct new garments for the family, to care for the ill ??? Who would be left to weave and make baskets and all the goodies the men needed.
Don't forget that the woman by no fault of their own had to take 5 or more days out of each month to go to the woman's site away from the men, Men were in great fear of a woman's ability to bleed each month and not die. A bleeding, pregnant woman, or one nursing a child is not good for construction work back then.
Slave labor is a possibility as the Tribes raided each other on a regular basis, Captives of young strong men and boys seems the most likely.
I believe if we are to find any secrets of the mound itself, we need to ask ourselves where would be a likely place to have had the builders live in that time. Climate at that time and the religious superstitions of the where the North, South, East and West were located, need to be considered.
Anything that is man made that long ago, and even today was not built by whim, there are reasons for every thing constructed, Check out the small towns that still have buildings that were constructed in the WPA period, if one looks closely one will find some odd things that are signs the Masons were involved in the construction.
In order to understand the mystery's of the past we must throw away any and all consideration of a thousand years of our own civilization and try to put ourselves in the mind set of those that lived in a time as Alien to us as if they came from another world, as indeed they did. BUT, they had the same human needs we have today, food water and shelter. Spiritual needs as great as they that built the Grand Catheralds of Europe 900 years ago.
