I believe you are going to have to wait till the last Saturday in April to fish that creek. As always though its good to ask about the regs, but you should always verify them for yourself. If someone accidently points you in the wrong direction I dont think a C.O. will view that as a valid excuse. Hope that helps, here are the regs for that area:
http://www.mnr.gov.on.ca/MNR/pubs/fishing/...ap_A_fr2005.pdf