I am a BYU Alumni and lived for 10+ yrs. in Provo. I went to the Caves many times and helped lead many groups safely through the caves.
One option to consider is to do a grassroots campaign to create a state law to solve the liability issue. This is what Colorado has done to preserve their ski resorts and tourism industry.
Colorado passed a law saying basically that skiing is inherently risky and every individual takes personal liability for skiing and CANNOT BY LAW sue a ski resort owner / lift operator for damages (including death).
This allows them to operate without the fear of LEGAL liability and allows the public to enjoy the wonderful natural resources that allow skiing.
The same thing could be done for caving. Attempt to pass a state law saying that cavers cannot sue private/public landowners for accidents (including death).
It seems this is the primary reason for keeping it closed. The remains could be safely removed at some point after decay and sufficient time has passed to allow emotional / mental healing (maybe 5-10 years or more)? However, to allow one family, although they have suffered a tragic loss, to decide the fate of such a wonderful natural resource that is owned by a public entity (although private) seems unfair.
Just my 2 cents worth.
Adam Hiatt - Fairfax, VA