Swimming

I live in Minnesota where we have to enjoy the summers at the lake to make the most of the warm weather while we have it.  But now as a nursing mom, how can I wear a swim suit when I'm leaking?!  I can't put the nursing pads under it because I'll be jumping in the water eventually.  But sitting in the boat would be tricky without anything to soak up any leakage.  Any suggestions?  This has to be a common problem I would think but don't hear anyone talking about it.  Maybe you all have some creative tips for me!  Thanks in advance!