Where are you located? Are these all from one winery, or wines you've collected over time? Have you considered asking a winery to send them for you? It might be worthwhile to do that.

I'd also suggest the towel idea if there is no other option. If you were in a small town I'd suggest trying to find some packing peanuts or bubble wrap, but it sounds like you're pretty far from civilization, yet close enough to buy wine.