if you're small (150ish) and know how to drive a bike, don't sweat it. get to know the tires really well, find their limits and pick good lines. confidence and skills go a long way.
that said, assuming the clearance issue only exists in the back, why limit yourself to a 30mm tire up front? given the narrow tire in the rear, I'd go for more volume and grip up front.
I did put the 32 I have on the front, but it felt weird since it was such a big difference. I am small, 145, and consider myself a good bike handler. I have no issues with running them, I was just wondering if anyone else did. I do not agree with the on comment above about traction in mud, it depends on what type of mud you are dealing with. All the mud tires I have ever had on my mtn bikes over the years have been extremely narrow so that that dive down into the mud deep and find traction.