Public radio star Garrison Keillor comes to Wolf Trap to offer D.C. another live trip to his fictional-but-oh-so-real Lake Wobegon, which will be broadcast over the weekend. This year's Wolf Trap stop of A Prairie Home Companion brings special guests The Wailin' Jennys. Produced in association with Minnesota Public Radio and WAMU. Friday, May 27, at 8 p.m., and Saturday, May 28, at 5:45 p.m. Wolf Trap, 1645 Trap Rd., Vienna. Lawn seats are still available for $25 to $90. Call 703-255-1900 or visit wolf-trap.org.