From the *Scrying* spell:
>As with all divination (scrying) spells, the sensor has your full visual acuity, including any magical effects.

So, I don't think the *Scrying* spell changes anything about your vision (so for example, you keep your Darkvision while scrying into a dark room). As others have mentioned, you would definitely still get a sensor at their location. However, there's also nothing stopping you as a Bard/Wizard/Sorcerer from having a *See Invsibility* spell ready to go. *Detect Magic/Alignment/etc* is also an option for most casters, but unless it's *Greater Scrying* you still have the chance to fail.