Poland is a joy for VFR below FL 95. No VFR flight plan needed unless crossing frontiers, radio only required for controlled airspace. Last time I went there no-one even asked if I had a transponder. And if you fly a glider, there are even areas where the wave soaring is good reserved for gliders to let you do diamond height without being moithered by those noisy things with props on the front.
Mind, I can get round a lot of France without turning the radio on, even if I do use a headset as ear defenders.