I drove to AK in 2006 using an old style Garmin with an onboard hard drive. Worked great until Fairbanks and then it simply said there were no roads to select.
Since then I have used Garmins to go everywhere with few problems. I do check MapQuest and paper maps when going into an unknown area to be sure the Garmin has chosen truck routes (shadowed in green in the RV Atlas).
Also updated maps every couple of years.
Life is a journey, not a destination.
2005 Georgetown 359ts
Bill & Virginia, Kentucky
Nights camped in 2011...78 , 2012...73,
Nights camped in 2013...123, 2014 ...101