I have an idea, but need to talk to Red a little more about it.
In rough: The Irvines and possibly others will be captured and seperated. The Irvines will seem to be dead and the group will not look for them. Afterwards one of the Irvines can talk to Drode and be sent back while the other one escapes/freed/rescued.
"Dulce bellum inexpertis."
Official Forum Expert on Norse Mythology
As Odin says in the Hovamal:
"Praise no day 'til evening; no wife 'til on her pyre; no sword 'til tested;
no maid 'til bedded; no ice 'til crossed;
no ale 'til drunk."