I just contacted both Innova and Discraft about having players from each of their teams coming out to play, can't wait to get the response back. As far as their tour schedules say, the Jenkins family will be at the USDGC Doubles that weekend.
As far as how the tournament will go, there will be a 1st, 2nd and 3rd place from each division like any other tournament. Also, we will be taking the scores from each team and taking the average (if the teams are lop sided) to find out which team actually won. If we have even teams, then we will take the lowest amount of strokes and that team wins.
And yes, on the day of, BEFORE play begins you will be able to pick whichever team you wish. After the tee off horn blows you are on that team all day and can only use that disc.