Don't move her, she won't 'get that' and will want to go back to the original spot, she'll not realise it's still her eggs.
A head torch if you have one is just as good as a candler or any strong torch you have if you cone your fingers around the lit end so to focus the light into the egg rather than it having radiate light. But you don't have to candle Karen, just if you don't think they're fertile (or if you just want to know anyway
) but I find hens get a bit more agitated about you handling their eggs than ducks do.
I feed brown bread crumbs at about day 3 or better still made sloppy with milk for protein (don't bother with food for them before that, mum will just eat it) and gradually mix in the harder crumbs - you can of course soften the chick crumbs but the brown bread crumbs help at the start so they get the idea.
I wouldn't take her off for a break either - I know the books say to do that sometimes but she'll come off at a time she thinks it's safe to do so and she knows there will be food there for her, she'll not understand you're taking her off for a break.
Don't fiddle around with her / eggs / chicks, have confidence to leave her alone to do it herself, she won't want intervention, she will just want you to leave her to it and she'll do it beautifully all by herself.
Good luck, just how wee and fluffy are these chickalumps going to be!