Getting to Hyalite: carpools or alt transportation?

May be flying out to Bozeman this December for some ice climbing with a buddy. We are hoping to avoid renting a car. I was in Bozeman this summer and thought I read there were shuttles out to Hyalite but now I can't find where I read that. In any case, is there any kind of group chat for sharing rides or alternative ways to get there? And is it active enough to get a ride mid-week in mid-late December? It's a five day trip if that makes any difference and no it's not during the ice fest.

Thanks!

No shuttle

Car rental is kinda the deal. Unfortunately, as you may have discovered, renting a car in bozeman airport is exorbitant even compared to most other airports in the US. 

I think my friend calculated that it would be cheaper to rent and camp in a U-haul if you minimize trips back to Bozeman ($1/mi) and if you pray that the U-haul can make it to the TH.