I've honestly not seen the vent lines ran into the air intake. Depending on how deep you plan on going..... I've got all mine run up between the front seat and dump bed, then slightly faced down to avoid water from getting in from washing, rain, etc.
The water doesn’t look deep...
2-3 feet hopefully is the deepest I get myself into. But I’m the type that doesn’t turn around.. I’m also the type that wash’s my toys. I’m worried about that too..
I also thought about building some kind of filter box that I could route all the vent lines too..