You and your children MUST enter the US before your immigrant visa expires even if without your wife. You may leave the US and stay another 6 months with her and hopefully she will have had her AP issues resolved.
There is simply nothing you can do, nothing she can do when there is AP. The US has national security priorities and they have to go through their process and will not be persuaded by any outside influence to issue her visa until the AP is completed.
If you fail to at least enter the US you are risking you and your children's visas because it could take a very long time for the Embassy in Ankara to re-issue your visas.
So it is better to use it and enter the US.
Once you enter you can even file form I-131 for a re-entry permit which would allow you to stay outside the US for up to 2 years and stay with your wife until her visa is issued.
Don't throw away your opportunity and fail to enter before your visas expire.
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