My sister’s and I have Over Riding Royalties in Mckenzie County, ND, which our father left to us. We had an “Assignment of Overriding Royalty Interest” filed and notarized in Montana. Now we are told by Continental Oil, we need to probate the Royalty Interest in ND. Is it easy to do the probate ourselves through the County Recorder or should we go through a Lawyer? We are trying to be cost efficient. Thank you for any advice!