IOWA,
If you are finding big healthy ginseng plants in that area then even if in the midst of a populated area you might want to consider buying some stratified seed and/or rootlets and plant that area back good.
If it is alredy growing there and doing well then there is no questioning the growing conditions, soil, light, etc has to be good enough.
It is not unusual for City Slickers to have absolutely no idea what Ginseng Looks like so you probably have a reduced chance of poaching there too.
PS - those berries you planted will not come up for about 18 months.
A ginseng berry planted in the fall goes thru a winter, spring, summer, fall, winter, then comes up that next spring (about 18 months later).
If you buy stratified seed and plant them in teh fall/winter they will come up the first spring.
Good Luck with your new found Ginseng Spot !
TNhunter