been having fun with some new toys.
Thought I'd pass on a few thoughts in case you don't know already.
1. You can get a free GPS device. How? Just get a phone that provides free GPS maps and positioning. I got a Nokia Nuron from TMobile. It has free Ovi maps downloading (you don't need a data plan) and works as full GPS positioning device. So basically you have gotten a free GPS. It's great. Importantly, I was able to download the maps and store them on the SD card before going to Europe, and then use them there without incurring data charges for downloading there (would have been very expensive if roaming, as in hundreds or thousands of $$, watch out). The maps are more current than on my commercial GPSes too.
(OTOH, know that this particular phone is inexpensive and a great deal given the GPS feature but it's not a great or full-featured smartphone. In particular the web browser sucks. But there are others I'm sure.)
So, great to have around as a backup for your big GPS device in the truck. Note, importantly, again, that this works even without phone cell coverage (but you want to download the maps of where you'll go first, it's very easy.) So it'll work in the middle of the desert as a GPS device.
2. Free GPS tracking of your vehicle. Easy. (Don't tell me you didn't know you are now tracked by Big Brother every where you take your phone...) Download a free app to your phone that does tracking of the phone. There are a ton out there. I did try 3dtracking on my Nokia which runs Symbian 60 OS. It's all free and you can track your phone -and therefore truck- and see the track on google maps via the web. IOW, your
can see where you are in case you break down and can send in the cavalry. Of course, you may want to stop the tracking when needed... 
Plus: free.
Minus: you need cell phone contact for the info to be sent to the server, of course. It's no satellite phone. So, not good for tracking in the middle of the desert. But eh, it's free and works wherever there is cell coverage... It's already something.
HTH
E
and yes, I'm still thinking about getting a SPOT someday. But not foolproof either apparently.
Thought I'd pass on a few thoughts in case you don't know already.
1. You can get a free GPS device. How? Just get a phone that provides free GPS maps and positioning. I got a Nokia Nuron from TMobile. It has free Ovi maps downloading (you don't need a data plan) and works as full GPS positioning device. So basically you have gotten a free GPS. It's great. Importantly, I was able to download the maps and store them on the SD card before going to Europe, and then use them there without incurring data charges for downloading there (would have been very expensive if roaming, as in hundreds or thousands of $$, watch out). The maps are more current than on my commercial GPSes too.
(OTOH, know that this particular phone is inexpensive and a great deal given the GPS feature but it's not a great or full-featured smartphone. In particular the web browser sucks. But there are others I'm sure.)
So, great to have around as a backup for your big GPS device in the truck. Note, importantly, again, that this works even without phone cell coverage (but you want to download the maps of where you'll go first, it's very easy.) So it'll work in the middle of the desert as a GPS device.
2. Free GPS tracking of your vehicle. Easy. (Don't tell me you didn't know you are now tracked by Big Brother every where you take your phone...) Download a free app to your phone that does tracking of the phone. There are a ton out there. I did try 3dtracking on my Nokia which runs Symbian 60 OS. It's all free and you can track your phone -and therefore truck- and see the track on google maps via the web. IOW, your


Plus: free.
Minus: you need cell phone contact for the info to be sent to the server, of course. It's no satellite phone. So, not good for tracking in the middle of the desert. But eh, it's free and works wherever there is cell coverage... It's already something.
HTH
E
and yes, I'm still thinking about getting a SPOT someday. But not foolproof either apparently.