Hi
If i understand correctly you want the remote VPN to have a primary and secondary tunnel to the 10.0.0.0/8 range ?
If so then you can configure more than one peer address under the crypto map entry in the remote site ie.
crypto map vpntraffic set peer
crypto map vpntraffic set peer
The remote device will try the primary entry first and if there is no response it will then move onto the secondary.
HTH
Jon