In NSW, it is illegal for anyone to park on the nature strip, ... except here in Albury, since they started narrowing the roads years ago, the Council or police don't enforce the rule.
But really, no-one should park in front of your place on the nature strip, so a call to the Police would do the trick if the motor home owners would not take a hint from you that they are damaging the area that you are looking after, ie mowing, etc.
