Yes, get a Ba'ader Moon and skyglow filter ($85 for 1.25" version from Andrews comms) this really helps with artificial light and moon glow.
Nowhere near as good as dark skies but it does make a big difference in blocking sodium skyglow, its the only filter I have and I think its the only one you will need to eliminate light pollution (or at least minimise it properly)
Cheers
Chris
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