Hello, I'm considering the new Garmin Dakota 10. Since it does not accept SD cards has anyone here been able to upload topo maps of Yosemite on it? I'm not sure if the Dakota 10 has onboard memory for adding maps. I think it does, just not sure. The Dakota 20 does accept SD memory cards in addition to having a compass and altimeter built in. I do not really need those features in my GPS. But I have read that the base maps the Garmin Dakota's come with is not too good. Again has anyone here loaded USGS Topo maps in close detail showing trails of Yosemite Valley? I do not know the exact grid, but its the valley and half dome North to Tioga rd. The Snow Creek trail to be exact. Thanks