Hi Mollie
Try contacting Admin, only they would be able to answer if Logotournament feels comfortable hosting such a contest. Not knowing the exact scope of the work or what will be required might require LT to make the contest with different rules such as the use of stock photos. Also, there is the question of pre-qualifying designers to be certain that what you walk away with meets all the specs and criteria needed for the different media.
Most designers here do much more than just logos so there probably would be an interest.
Good Luck.
Night Owl