I had a similar situation last year, except it was a paying fellowship and the city was an hour and a half away. The program involved interviewing with multiple agencies and they would make offers based on the interviews. I was able to work my schedule to do face-face interviews with a few agencies and phone interviews with a few others. I got offers from all the agencies I had face-face interviews with and rejected by all the agencies I had phone interviews with. There is a lot to be said for making an impression in a face to face interview. Then again, a five hour drive is pretty rough for a non-paying gig.