Looks like it maybe early this year ?? Were teetering on the edge of a warm up right now.. it will be 45*f this friday low of 40*f if I was you I would plan two trips one around first or secound week of March.. if you hit them then keep going every week end. the other the beginning of April like you were thinking.. I thinking it will be early this year. Heard some report people were starting in end of Febuary for coho' steel browns etc.. this year .. looking at local weather makes me think it will be early like there thinking.. but will see when it gets here.. you could check ice via Web cams.. of the piers?? Once ice is gone get out there!!