Well, the first step in doing this is for everybody who knows that they will be taking the bus to post some info. All that is needed is the town that you will be starting in, the day on which you on plan to arrive at the gathering, and time of day at which you will most likely want to start your greyhound ride. Now some towns have more than one station, if this is the case with your town then be specific about which station it is.
We don't know where specifically national gathering is yet, but if everybody posts the day on which they want to get there we can all figure out for ourselves when folks are likely to be leaving for the gathering.
Go to the greyhound website(
http://www.greyhound.com) plug in your info and find out when busses leave from your town.
If we all have everybodies info on place and time of departure and date of arrival we can plug it into the greyhound website thingymado ourselves and get everybodies bus schedual. That way we can know who will be getting on the bus when and at which towns, who will be transferring busses where and etcetra.
The only difficulty with doing this now is that greyhound does not plan all scheduals this far in advance. Some are already planned, but some are not. Mine is not so I cannot get a schedual. If we wait a couple of weeks all should be well.