The temperature was 25 degrees at 6 a.m. on Tuesday, with wind-whipped flurries in the air, as Gary Soldati pulled his pickup truck into the parking lot at Tanglewood, the Boston Symphony Orchestra’s outdoor concert venue in the Berkshires region of Massachusetts.Four hours remained before tickets for the summer season went on sale. Even in the wintry darkness, Mr. Soldati, 72, of West Stockbridge, could see he was the first one there. Now all he had to do was wait: for the box office to open at 10 — and then for summer to begin.According to the calendar, it was the first day of…