I'm not sure about the solidify modifier, as I haven't used it very often, but I long ago realized UV unwrapping was faster, and easier, if done BEFORE using subsurface division.

Needless to say, it depends on what the object is. This has always worked for me when modeling clothing. It's been a while since I've tried modeling a large prop or environment object with lots of detail, so not sure if doing the unwrapping before subdivision in that instance is better. I usually only use a Sub-D of "1" for clothing, and I usually do that in Poser, as I only use Blender for modeling, not final rendering.

Again, this is just how I usually work. Others may do things differently. I think you need to find the easiest/best way that works with your workflow.

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OK . . . Where's my chocolate?

Butterfly Dezignz