What a issue! I have a bunk trailer and worry about the issues raised about them, I do try to get everything visible off the trailer but what can you do about the buried. I think they should put their, our, money into every state boat ramp having a wash and even chemical application to keep them free of invasive creatures, and perhaps state funds for private launches. I also think that the ocean liners that bring us these things ought to be equiped to kill everything in there bilge before they enter our waters or anyone elses or slapped so hard their teeth rattle.