This might be too late, and really can't comment on the bream, but fronts do most definitely affect white perch. They become not nearly so agressive about biting and don't seem to want to move far out of their way to bite. Also tend to hold tighter to cover or actually down in a brush pile. If you stick a jig or minnow right in their face and leave it there long enough they will still bite. Key deal on them for me is to slow way down and try and get my jig right near the cover. Mild fronts like this one don't seem to bother them near as bad as those major storm producing fronts, but it usually efects them some. I think it's about the pressure change but don't know that for fact
I don't think cold fronts have nearly nearly the same effect on bream. If you got some crickets, and was able to get some local information on where to look for beds, I don't think you'd have a problem catching enough bream to make a fun trip for everyone. If it was an easy choice to wait a little while and go closer to a full moon, that's what I'd do but if this is a rare opportunity to get everyone together that might not come along for a while I'd say go for it and be prepared for better bream fishing than the white perch fishing. I've found the Berkley crappie nibbles tipped on my jig seem to be quite an improvement in these conditions and the bream like them too. Sure would be worth the price to take a jar of them along. Chartreuse is hard to beat as far as color of crappie nibbles go. Good luck and have fun - surely you can find some bream and maybe even get on some beds of big ones!
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