It’s always hard to get on the road for a bunch of days away from the family; this time I have the compensation of what’s on the other end of the road. It’s time for the Tanglewood season opener, where the BSO and the Tanglewood Festival Chorus will reprise this spring’s performance of Berlioz’s magnificent Les Troyens in its sprawling entirety. Should be a fun time, and there are already signs that the BSO front office is having fun with the production. Witness: the 10-foot-tall Trojan Horse (no doubt stuffed with a pair of ninjas) that will grace the opening night gala. Now all we need is someone to play the role of Cassandra and predict great doom should the caterers wheel it into the tent.