30lb should be enough, if you go heavier they fish may shy away as they can be quite picky on certain days. Iv had to drop to 20lb and even 15lb to get them to bite some days. I would suggest if they are around to switch to metal slugs and just fish them virtually like the micro jigs but with a fast wind, you should have much more successes getting them to the boat. In saying that I have used the knotable wire on some of my jigs with pretty good results.
cheers