running RCA's???

I'm wondering what is the best way to run my RCA's to my amps? Right now I have about 25 feet of RCA's starting from the head unit next to the driver console going all the way around the back of the boat (next to the gas tank) and back up into the storage compartment under the passenger seat. The only reason I went this way was to avoid crossing any power wires but is this really a problem? I would much rather run them up underneath the bow of the boat instead of running 25 feet of RCA's is this worth it? Or am I risking noise from the battery cables? I even had to get some adapters and a second set of 5 foot cables to run the last few feet. Everything I've ever heard says that I should be avoiding connections if at all possible which is another reason I would rather run it up around the bow of the boat.