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With a 10" dob and an eyepiece giving a 2mm exit pupil, pretty much every DSO plotted in Sky Atlas 2000 will be visible at a dark site, though you'll also need a nebula filter for many of the tiny planetary nebulas to distinguish them from stars.
In a light polluted back yard, every DSO plotted in the much smaller Bright Star Atlas will be visible.
In a light polluted backyard, the dimmer open and globular plotted in Sky Atlas 2000 can be more easily seen than galaxies.
Some people prefer 3mm exit pupil eyepieces for viewing faint stuff. But I've always found a 2mm exit pupil best for galaxies at a dark site, and 1.8mm at a light polluted site.
You will be in for a treat when you do go to a dark site.
Regards,
Renato
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