It's a long drive from DC, but really simple. Since it's on the north end of the Baltimore beltway, I'd imagine that taking public transport would be an all day ordeal, and you'd probably get stranded for the night after the show is over.
If you drive, just take 95 to 695 West (Baltimore Beltway Inner Loop). Take the York Road south exit towards Towson, then at the traffic circle in "downtown" Towson, go straight through, continuing on York Road and the Recher is immediately there on your left.
You can find plenty of metered street parking or cheap garage parking around there, we usually park in the library garage, which you can find if you take a left on Chesapeake Ave, about two blocks from the Recher. I think it only costs $1 on weeknights.