Hey, Boo-boo. Honey-wrapped campers, what a treat!

Honey is water-soluble, so it's not going to be a huge problem. I'd sponge as much as possible off first, then launder it in a proper machine with down soap. It will be as good as new, since you'll restore some of the loft that's gone missing over the years as the down has accumulated dirt, sweat, etc.

I wash my down stuff in a front-loading machine on gentle cycle using various down soaps--Nikwax most recently. Drying and lofting takes nearly forever, but that's about it.

Good luck!