Skill challenge or not?

So I am preparing a short campaign (levelling from 1-3) to give our DM a rest and just read about skill challenges. My question is whether one of my planned encounters might be better used as a skill challenge. The encounter in question is Iike a side quest that happens on the way to part of the main arc. It's basically a fey prank encounter where the party is tested by pixies. They are spirited away in order to help the non violent pixies by taking care of some horrible creatures that have invaded the forest. The creatures turn out to be essentially harmless bunnies (Happy Bunnies to be precise) except that if they are killed they damage their killer by reducing them to zero hp (perhaps not, still debating their lethality). The bunnies are actually polymorphed pixies who will restore all as it once was at the end of the encounter, with rewards for a job well done or curses for a poor performance. I haven't come up with a "correct solution" to the puzzle of how the party is supposed to "take care of" the invaders, I was hoping they would come up with something that would reasonably work on their own. (Am I being too optimistic?) I essentially wanted something that gives the party a break from "go here, kill that, get loot". Does it sound like a skill challenge might work here?