I have had pretty good results using light pollution filters. Yes, I need to take longer subs but I see an increase in the SNR. The two filters I've used are the Hutech IDAS and the AstronomiK CLS. The latter filter really needs longer subs than the Hutech but does a fine job in pretty heavy LP. All the photos on my PBase pages are from North Curl Curl. My most recent is here and used the CLS for luminance and no filter for colour:
http://www.pbase.com/prejto/image/155539657
Peter