I have what sounds like a choral concert (live) recording later this spring. It is at a venue I've never recorded in before. They have a number of mics hanging about the place - don't know the details, but I recall seeing a jecklin disk and a decca tree and at least one conicident pair. Before the recording I need to get in the joint and scope it out - decide where I can setup, if any of the existing mics are worth using (if they'll let me plug them into my gear) ... etc. If this was your gig, would you charge for the time spent on-site before the job getting the details in order? It seems reasonable to me - if it were my day job we sure-as-hell would - but that's a different market.