
I have never even owned a crate with my previous dogs and used to think it is not good for them. I too would have been one of the people telling you to dog proof area of the house for her...
Now I have actually changed my mind about crates slightly.
My girl was never crate trained (16months old and never even seen a crate!) but when she was hit by a car she had to get used to spending three weeks in a crate, 24/7...
She adapted so well and we never really had any problems except odd little pawing to say can I come out.
She was not left on her own at all for the first weeks tho, which must have helped.
She is now well enough for me to get rid of the crate but I don't think we will :)
She has not yet been left alone for longer than few hours but I can definately see a difference in her behaviour when left in the crate or left free in the house!
She is much more calm and doesn't get mad when we come home which makes me think she doesn't stress so much about us leaving her when crated...
The neighbours have also told me when she was left free in the house she cried after us... but not when left in the crate!
She also spends her nights in the crate as she can no longer come upstairs with us(decision made when she couldn't, not that she physically can't now).Again she settles in the crate but cries after us if left free downstairs...
I think the sleeping in the crate over night has made her connect sleep/relaxed and crate meaning when she is left crated she goes to sleep.
She also takes herself in the crate when she wants to sleep so I can say she has taken to it well :D
So crate can be used to make the dog relax when left alone, not just to stop the dog destroy the house :)!
I have no idea of "formal" crate training but maybe popping her in to chew a bone and have a nap would be a start?
Having the door open if necessary, you sitting next to the crate?
If she likes to be petted, do relaxed petting massaging sessions while she is in the crate?
Put the crate next to the sofa so you can watch tv together while you pet...
I would say the trick is to do your best getting her to like the crate as a comfy bed, not connect being left on her own and crate until she is liking the crate loads :D