Is there any chance that the 'rescue child' task could just become 'rescue adventurer' task instead? It could work exactly the same just reworded a bit.

Task: "We sent out an adventurer to cull some 'insert critter' in the 'insert area'. We havent heard back in some time and they might be in some trouble. Are you a bad enough dude to rescue the adventurer? "

Then just go out just like normal, kill abuncha stuff and change the npc to a battered 'race' adventurer. Change some of their canned comments/complaints. It would just make more sense, especially at the later levels. Mebbe even have it stay rescue kid til like level 15 then rescue adventurer would start after. For bounty titles sake just name them 'rescue' tasks.