I payed a bagpiper $100 about four years ago for my Mother-in-laws funeral. He played about three tunes on a whistle at the beginning of the service & piped Amazing Grace at the grave site. But he lives only 45 min from here. But he was a good friend of mine but his only living is as a performer. He did give me a break in his usual rate. I often play for friends too but I usualy don't ask for anything BUT they are usually within a half hour of my home. 400 miles is a long way to go pay or no! Considering the distance, I would ask enough to cover (at the minimum) 1/2 of my expenses. And that would be only if it was for a friends family. No relation, no friend connection, yet out of the goodness of your heart, I would ask for more or simply decline.