Stephen, my only connection with Delorme is one with a long time usage. I visited there the week after 9/11 on a bird watching trip. They gave me a great tour. I have used their mapping program for several years.
I have requested another tour on this birding trip and with your permission, I will discuss your venture.
I have their GPS connected with my laptop and it is a neat program as it talks to you. If you goof up, it will kidnly suggest you make a safe U turn and then give you directions.
I use their restaurant and hotel directions very frequently and they are very accurate.
Paul E. Smith