You should run all vent lines to a "T" and run one side up under the tank and the other down behind the swing-arm. So if you have 2 vent lines you will have two "T's" and two sets of vents up high and two down low.
This will stop the vent lock when crossing creeks as the vents up high can still draw air while the lower vents are in the water. I found some hose the right size at my Walmart and "T's" at my auto parts store.
This setup will work wonders and is very cheap as well!
Go forth and modify my friend.