Unless you are asking what I do?
I publish this thread, usually in July. I try to keep it bumped to the top and share on other boards, like the resort boards, to find donors and coordinators to volunteer.
Prior to 2013, one person coordinated all of the trees for all of the resorts. All donors and sharing families went through him/her, and sharing was assigned based on length of stay, numbers and ages of children, and some other factors. The Excel spreadsheets were a sight to behold.
This was, first of all, a lot of work for one person, and, second of all, meant that one person fielded all of the problems and complaints that people had. Apparently there was a lot of complaining and too much work. When I sent a PM to the coordinator in July or August of 2013 because the tree thread hadn't been published yet, the 2012 coordinator cited these reasons for getting out of coordinating the tree exchange. A few of us on the boards brainstormed to figure out how we could still have a tree exchange. Dividing up the workload by having exchanges at the different resorts coordinated by different people was our solution, and we kept the tree exchange from dying out altogether.
A downside to this, though, is that if no-one volunteers for a resort, the resort doesn't have an exchange. If there is only 1 tree donated but more than 1 family wants those particular dates, only 1 family can be accommodated.
It isn't a perfect system by any means, but I am glad we have it, and I am still happy to do it.