Good morning Bags,
I'll write a little about how it worked for me on this last trip.
I had purchased a new GPS78 before the ride. I already had 2 GPS 76 garmins but since they were limited to 500 points and 20 tracks per
I still needed more space for tracks.
On top of that I had no idea how I was going to fit all the States coverage maps into those 76's and still have them be routeable.
Here's what I did.
I mailed GPSKevin and explained what I was trying to do.
He responed with something that I'm still not completely sure I understand.
First he had me finish making my route. I didn't have to worry about the amount of points or where I created them. Google, BaseCamp,
GPSXchange, where ever was fine.
Once finished I zipped them to him.
In the end he made a Map of my route overlaid onto a routeabout map of the U.S. and loaded it to a SD Card.
I inserted the SD into the new 78 and when you turn it on there's your route. The entire thing is shown.
The only thing I did before leaving was to quickly learn the GPS functions and to setup the screens the way I wanted.
I also did spot checks on the track. Example: I'd zoom into a certain area ans verify the route was were it was supposed to be.
Kevin also loaded gas stations locations and motels along the routes I was headed. They were listed as waypoints.
Jumping into this new system I never had a single issue with any of it.
Make sure your map is routeable. Do spot checks on your route prior to leaving to make sure everthing jives with what you thought
you planned. Try creating and loading a short track around your hood then try following it. Make intentional wrong turns to learn what the GPS does to try and correct. Fancy models have all sorts of options for you to choose from has to how it will "assist" you.
This little demo ride will help you figure the one that works best for you.
I know you're not new to a GPS but the above system is what I used on that last run and it worked perfectly.
I never looked at one paper map the entire way nor did I carry any. Anytime I needed something I just searched it on the GPS. (something else you may want to practice)
I did bring one backup GPS with a spare loaded SD card in case I broke the main but never had to use it.
49 days out in the dirt and never lost once, all by using a system I had not used prior to departing.
Hope some of this helps.