As i all i have is a helmet, i obviously cannot partake in the movie, but i thought id give you a suggestion:
Whatever story you go for, make sure that you get someone to storyboard it first. There may be some scenes where it is prefereble for most people to join up someplace and film, but for scenes where there is not much movement you can have members film themselves infront of a greenscreen (a green carpet or something similar), so that they can join in the movie even though they may not have the funds for a planeticket to go to the prefered dessert (or wherever you plan on shooting the movie). Most movie editing programs that are worth using have the capability of "blocking out" the greenscreen with fairly little effort. Then all you have to do is place them in the scene and adjust colorbalance and all that, and perhaps add some shadows. If people have poor cameras they can just be placed further back in the scene as it will not be that visible, and you could get away with blurring them a little.
That way most members should be able to partake, even though all the MEPD brothers are spread all around the world. Good luck with the project, i hope you guys make it!