Well, I was thinking if you were close enough I might be of help, but I'm not sure when I'll be rolling through your area next. I'll check my schedule, and if you want to wait a bit, I could maybe hook you up.
If it's of a nature to where someone might view it as a service project, you might could ask on the local Craigslist and find a volunteer, or you might pay them for the work. If you have a good idea of the basic layout, sounds like a good day's work, maybe?
Course you really don't need much of a detector, quality-wise, to find your marks, considering they are shallow and substantial.