That is a tough moral question, but I also lean toward letting the dead rest in peace.
If, during some excavation remains are uncovered, then an effort can be made to recover. But not to go out hunting.
"Good frend for Iesus sake forbeare To digg the dust enclosed here Blest be ye man yt spares thes stones And curst be he yt moves my bones". (Inscription on Shakespeare's tomb, Stratford-upon-Avon).