Get some deep water racks/stabilizers for the 330’s. Do some walking and find out where they’re living. Either in a lodge or under the road or spoilbank. They usually have two or three access points. Put the 330’s at the bottom of the racks and stick them flush with the bottom at access points as close to the lodge as you can and make sure they are sturdy. You can identify them because the bottom will be hard where they are sliding in and out. Same for the ditch. If you can find a log that has already been in place for a while you should be able to find where they are diving under it. Like crossings, they dive in the same place every time and will have their own channel on the bottom. There’s a 1000 different scenarios, but catching them where they live is a quick way to knock out a few.