Thanks - good to know there are alternatives.
So far plans are only to take day trips and anchor overnight in port. However the trip up may take most of one full day, without any errors in navigation, which have happened - with a non-working installed GPS, and dead batteries on a handheld GPS.
SO is making a huge deal out of this, so there may be more there than meets the eye. I'll just peruse the handhelds online, and have the credit card ready as long as there aren't more issues on the horizon.
Thanks for giving me an idea of where this all lies in the scheme of things!