I generally resize the batch to 2000x3000; this makes all the files a consistent size and is still plenty big enough to print. Since I'll almost always do a little big of straightening and cropping, the full resolution would otherwise be inconsistent from shot to shot. If we've done a specific shot for an 8x10 headshot, then I'll crop and resize that one to 2400x3000, so that it's already the right aspect ratio and is 300DPI at 8x10.
I'll also include a second set that's sized for web and social media (generally 1024px on the long edge), with a small identifying mark. Generally, models will be happy to leave my name/logo intact for their informal sharing on Facebook and such.
... so, yeah, exactly what RDKirk said, with the exception that "full rez" is actually a mild resizing for consistency's sake.