Carry a computer with encrypted data but don't use it; remove the hard drive to copy the data to another computer in order to decrypt the data with the separate

Carry a computer with encrypted data but don't use it; remove the hard drive to copy the data to another computer in order to decrypt the data with the separate key. Discard the old hard drive and old computer afterward. Do not use a single key; require several keys that are with different people, combined only in the way that you know how. Ensure the people are present to notice if the police try to come in.