As I stated above, I can (and have) loaded all the maps and routes needed for a coast-coast tour. And as for needing maps on more local tours, I've found the POIs to be particularly useful. Even in my own county I might not know where the nearest bike shop, grocery store, ATM, or restaurant is when I want to find one - the GPS lets me know my nearest options and how to get there. That's particularly true when touring when you're gone for a longer period of time and have more need to find useful businesses. Having the GPS along also encourages me to be more adventuresome. If I pass a road that looks interesting I can quickly glance at the map and see if taking it will still let me get back to my planned destination or if it'll lead me to a deadend or in the wrong direction. So I'm more likely to explore unfamiliar paths than if I didn't have it.