Accept the task. If Brother Owen is going to help your group with your problem, you can help him with his.
Accept the task, but propose some kind of compensation in return. Aelric, Dan and Martelo aren't druids and they, at least, deserve some consideration for endangering their lives.
Decline the task. There's no way you can withstand a swarm of aggressive, giant wasps. Suggest an alternative task to help the elder druid. (Please comment.)
Some other creative approach? (Please comment.)