That's about the same advice I would give. Don't get in too much of a hurry. Not while hunting, digging, drying, and even selling. It seems like you can't rush anything with this plant. Also, don't get too greedy. Always leave some mature seed bearing plants in a good area. Pinch the tops off so that nobody else is digging them this year, but always leave some roots in the ground to seed the area in the future. Do this and you will have good spots to go back to in the future. Good luck to you.
p.s. - This advice is for future years. Get out in the spring about the time yellow morrels are popping up or just after, and scout for ginseng then. A lot of the other plants aren't that big then, and it is much easier to spot than it is in mid summer, but not as easy as when the plants are yellowing in the fall with pods of crimson berries hanging on them.