If you're trying to choose between these two options you've already made the biggest mistake. Kind of like choosing between a rock and a hard place when you've got dozens of pillows around you.
WHY on earth would you want to take either of those options when you have the time to take the correct, safe and easy option?
I, even as a glider pilot, have never had to 'land out' but I've landed at a number of places which weren't as good as the surrounding fields.
However, the situation you describe sounds like a low-level navex. IF.... the viz is sufficient and you know where you are.
If, however, the viz begins to deteriorate or the bases start looking lower, you want to be finding yourself a field.
But on the other hand if its windy you're may have your hands full and it's bound to be just as bad in the clouds.
So you're probably better off finding a field and landing!!!