Fly, I would limit the number of sponsors on the Ts and sweat shirt to a handful of the major contributors. To ensure that all of the businesses who have donated to the cause recieve recognition you might want to consider getting a banner made with all the logos on it and displaying it at wherever headquarters is for the Tourney on the river and then take it to the barbeque for display. Banners are not too expensive and that way everyone gets credit and the handful of big time sponsors get the extra marketing on the T and sweat shirts, without turning them into bass shirts.

I wouldn't worry about individual contributors; just companies with logos.

Good luck.

Mike