Not only are they noisy but they increase wind resistance and therefore fuel consumption.
That's why I mentioned the Whispbar. they're awesome.
...I would rather have a trailer than roof bars. (I don't have a trailer either)
I've got a trailer too, the only things that go on my roof bars are the kids SLS Boards.
I have figured out the light bar I have will fit between the headlights. Under Queensland regulations I have to mount it so it is not in the driver's line of sight so on the top of a nudge bar that comes to bottom of grille height is about as high as I could go. What I need is a nudge bar that attaches somewhere other than under the front bumper because those that mount there reduce the approach angle by the thickness of the bar. If I could get one that comes out through the lower part of the front bumper it would be ideal even though it would mean I have to cut holes in the bumper.
I ended up modifying things a bit to mount my lights. The mount is actually bolted to the Reinforced part of the bumper, which required a bit of cutting (in my case of the grill to ensure the lights don't stick in front of the Bumper) -another no-no legally speaking is having anything projecting out in front of the bumper.
It involved a bit of planning but the end result is worth it, no Nudge bar, no Bull bar and the lights look (in my opinion) good.
The trick is getting a solid enough mount that sits on, or just above the existing bumper. If you're not afraid of cutting up the plastic bumper a bit, it's well worth it.
I'd like to get a bull bar on the front of mine for additional protection, but there is nothing available that will fit the Blitz 240s, they're not really designed for a smallish vehicle, but light output and the price I got them for makes them worth it.
Mind you, back in the day I used to get around in a VW Beetle with Cibie Super Oscars on it. They're still the best lights I've come across, but pretty exy nowadays. It did look a bit odd though (I like odd)