INKING
If you can't ink (well), find someone that can. If you can ink, still try to find that someone else. It's an awful lot of work and can be quite hard on the wrist and fingers if you, like Petra, use inking pens and press way to hard. But then again, you might be a wiz at inking with brush and just love cleaning up those messy pencil lines.
If you're the one who's doing your own inking, it does have the advantage of not having to draw very detailed. A part of the drawing stage is then done during the inking, thus saving on time and labour.
Two options you have here. You can ink directly on your originals but be aware, if you use a coloured pencil next to your ordinary pencil smudging can occur (see page on Drawing). So if you ink on your originals it's better to stick to one colour of pencil (black being easy to erase, colour being near invisible when scanning as line art, provided you keep the lines light of course).
The other option is to use the light-box. This will mean no erasing at all, allowing the use of both grey and blue pencils, and will give you nice clean lines as you are tracing on new paper. This way you can also make a separation between paper qualities, using cheap stuff for drawing and expensive bleed proof stuff for the inking (we stick to cheap, free if possible). When there is too much detail on your pages though it may be easier to give the original a little basic line with ink so it will be better to see on the light-box.
One thing that can come in handy is one of those lamps with a magnifier that you can bend over your work. They are usually used for things like embroidery and other crafts, but work great on those panels with itty-bitty drawings with lots of details as well. They do cost a penny, so if your mom has one our advise is to snatch it!