I used a Magellin for several years and it works fine. On occasion it would lose the signal if I was pointing the wrong way, but for the most part it was always seeing a satellite.

For this trip I am going to use my Garmin 396 that I ordinarily use in my plane. I know some others have used one. I am hoping that this will allow my to have weather information as well as trip guidance.

All GPS units are designed primarily for the sloped windshields of cars (or planes) so our near vertical windshield does not allow the antenna to receive signals from as many satellites. FWIW, my GPS will not work in my Mercedes apparently due to some coating on the windshield.