A controller won't know your license privileges, so you must always tell them if they issue an instruction which you cannot legally comply with. They will usually give you an alternative, but it may mean holding, re-routing or de-gradation of service (RAS to RIS or FIS).
If you are above 3000' then quadrantal flying is compulsory at night outside of controlled airspace, so you will need to make sure that the weather is suitable for your license priveleges.
Even in the darkest areas its fairly obvious if you have gone into cloud, but I'd question the wisdom of flying night and single engine in remote areas.