I think this can be done by a macro :

http://wow.curseforge.com/addons/jam...lash-commands/

So that would be :
/jamba-team remove all
/jamba-team add name1
/jamba-team add name2
/jamba-team add name3
/jamba-team add name4
/jamba-team add name5
/jamba-team iammaster <-- not sure you need to add a tag there
/jamba-team invite all
/jamba-team push

Then you create another macro to set up your usual teams for each toon.
Untested, maybe that needs to be tweaked a bit.