My fridge is also in a slide out - fortunately, it is on the opposite side. The fans suck up air through the bottom vent and push out the top. Good advice on the baffles to channel the hot air. Mine has them along with 4 fans. There is a thermocouple that controls the temp of when the fans come on. I tried installing a 12v fan to suck up cooler air from the bottom, but then the fans didn't come on as much and shut off sooner. So I moved the fan to the upper vent and had it blow air out. I also reduced the size of the air cavity at the top using insulating foam blocks.
That helped some, but not enough. So I started using the blue ice blocks in the bottom of the fridge and set the circulating fan on the rack above them. This keeps the fridge at acceptable temps - in the Florida summer. I don't need the ice blocks in fall/winter.
Not sure what you can do about your setup as your chief complaint is that the fans make noise and the fridge is curbside.
I'm looking into upgrading to a residential fridge - that would solve your fan noise issue.