With your current scopes you might have more luck focusing your filtering efforts on imaging Jason, since you can use filters which cut out most/all light pollution but that are sensitive to light emitted by nebulae (eg. H-alpha filter).
I'm not into imaging but here's some info to start with:
http://starizona.com/acb/ccd/advequipfilters.aspx
http://starizona.com/acb/ccd/advimnarrow.aspx