If a map of the trail could be imported into Mapsource or Mapsend, then one could bring the map of the trail and related caches into your GPS.
I have MapSource (Garmin) Topo, but haven’t specifically looked to see if the I.A. Trail is on it. I suspect part if not all of it may be, since Mapsource Topo purports to have (major) trails in it.
I just (re)built my computer and am in the process of loading software back in. When I get a chance I’ll check and see if the trail is on there!
Not sure what brand of GPS you have, but if it is Magellan, I’m sure that Mapsend will have the same data.
WISearchers