@ piperboy84: I'm only just finishing up on my license so these may be stupid questions, but:
1. Don't you need to be in sight of the ground for VFR? Can you do that if there is fog over your flight path / below you - or can you see around to ground level?
2. If the fields you are flying over are IFR only would that not disbar them as possible alternatives in case of the need to put down - so choosing a different route might enhance your safety overall?
As I said - prolly daft questions but would value your feedback for my own education!