The weather's not looking so hot for my trip up to the Berkshires this weekend, but fortunately there will be plenty of indoor activity to keep anyone heading up there occupied. Tomorrow, I'll be at Tanglewood to see Josh Bell and Kurt Masur with the Boston Symphony. Saturday, I'm opting for the annual Bang On a Can Summer Marathon at Mass MoCA, though many will be heading back to Lenox to see James Levine conduct Don Carlo with the students of the Tanglewood Music Center and an all-star cast. (I've been to Levine's opera with the kids the past two seasons, and each has been extraordinary.) If the weather clears up on Sunday, I'm going to try to make it back in time for the TV On the Radio show at McCarren Pool; otherwise, I'll swing up north to Vermont for the matinee at Marlboro.