How enforce CC&R's?

[Henley Smokey]

We recently purchased a property in a subdivision that's entirely new construction (and still being developed). A consideration when purchasing was the CC&R's, which prohibit trailers from being parked outside in front of properties. The neighbors, however, have a trailer that's consistently parked outside in violation of the CC & R's. It's our understanding they've received notice from the folks who currently oversee the CC & R's (I believe it's the developers), however, then continue to park their trailer outside. We have not reached out directly to the neighbors as it would seem that, if they're not responsive to notification from the people on the CC & R committee, who are the authorities here, they would not be receptive to us saying anything and would potentially worsen the situation.  We're interested in the CC & R's for the subdivision be enforced- Any suggestion, given the circumstances, what the best way to do this is?