blonde highlight greying hair

My greying hair is depressing me and I was wondering if about putting blonde highlights in to camoflage the grey a bit. I was thinking of using a cap and a permanent blonde colour as the highlight kits only lighten hair colour and I will need to colour the grey. Does this sound like a good idea or not. My hairdresser only does foils (you get 8 then pay extra for more) I dont know if this is a better way, I imagine the foils would be chuncky and obvious. Any suggestions. Thanks.

Thanks for your response. I have since been to a hair salon (quite a posh one with a good reputation) and discussed my problem. We have decided on 2 darker blonde lowlights and some blonde highlights, actually I have been looking at other peoples hair and starting to like the chunky blonde highlights. I have always just done the pull through the cap thin strands, time for a change though. I have long one length hair (taken forever to grow out all my layers) and now I am going to have it cut with some layers put in! This is so that the natural curl will bounce up again as the long hair and overprocessing has killed most of my curls. Is your silver hair short? I think it looks good short but I cant stand it on my long hair.