Sian -
contact Colleen Miller at the Old Town School of Folk Music re their July Roots fest at http://www.oldtownschool.org/contact/admin_list.html
and the City of Chicago at http://egov.cityofchicago.org
re their Celtic Fest in September
Search on Celtic Fest to find the info
I hope they will book some of your TRAC folk.
Pob lwc, Chris