Spot altitudes? Mast heights etc? How far do you descend above those points before calling it a day?
Well I would say, as long as you maintain compliance with the IFR...ie 1000ft clearance within 5nm the estimated position of the aircraft.
If you have to take an approach into a nearby airport to break off for a visual landing at your own field/ landing strip seriously consider landing off that approach as the cloudbase is likely to be be so low as to make flying VFR questionable?
Quite possibly that would be a good decision. But if you know the area really well and the distance is not far to get to your field then a low level transit would probably be OK at say 800ft.