If I were you, I would also document your finds with as many photos as you can take. There is a story to be told here, and once this site is sifted, all of the info of the actual dig will be lost after your memory fades, and you leave this world. Out of respect for your relatives, you don't have to post the photos, but they should be taken never-the-less, and shared with the family. When that ring was lost, it had your name on it. No one else COULD have found it, because it was destined for YOU to find. I would also record the depth that you are at of each artifact you find as well. This is a once in a lifetime opportunity. Never use any type of heavy equipment, only a hand shovel, and a sifting screen with 1/4" mesh. Work very slowly one section at a time, or better yet, one "level" at a time. When you find grouplings of glass or other artifacts, photograph everything! Like I said, this doesn't mean any disrespect to your relatives at all, and these photos can be kept with the entire collection you aquire. I have worked with the Archaeologists for years, and I understand all-to-well the importance of your site. Work slow, no need to be in a rush. Since this is family owned property, you have the advantage of being able to taking your time. This is a dream come true for most of us, so be as thorough as you can out of respect for your past (and future) generations. Once you are finished, it can never be re-dug again. Everything is still intact within its context. When you take your photographs, lay a tape measure on the ground, so the exact location can be recorded, like the distance from the North wall, and distance from the East wall. All this info will come in handy when you graph it all out on paper, and mark down all the artifacts, and their exact locations and depths.
Most of us would give our eye teeth to be in your position, so do your ancestors proud. Please think about what I have suggested. In years to come, you will not regret this for one second. If there is any assistance I can lend to you over the computer, don't hesitate to ask. Hey, I am just a keyboard away! One more thing, be sure and mark down the lacation of the walls by using a compass. The walls may not be aligned with exact N,S,E,and W.
Good luck, and savor each and every moment you have with this. THIS is why you found the ring. YOU are the only family member that can do this, and do it RIGHT!