"" and [] in the same adgroup??

[pt-mike]

Another question:

Ok let's say my keyword phrase is "picking wild mushrooms"

Is it ok to put all combinations in my keyword box or would it create conflict? (I have read googles stuff on this but I don't always take on what google say):

"picking wild mushrooms"

This would catch the phrase "picking wild mushrooms" plus modifiers before and after the phrase. This would be useful to catch all.

[picking wild mushrooms]

This would catch only the exact phrase [picking wild mushrooms] which I believe should be highly targeted as I want no other phrases except [picking wild mushrooms] but it would cost me a little more CPC

If someone searched for picking wild mushrooms then I guess that the higher quaility ad would be triggered. This being the case the higher quality would be the lowest CPC

I have read about this in several places but still is not too clear. But I think I got it figured???

Any advice?

Thanks

Mike