Hi carlyle0815
It is the same issue as of mine.
My wife cannot land with me as She needs to leave canada for 3 weeks for a vacation. If we do landing together then it takes 30-60 days to get PR card. Without that if she travels then she needs travel document from CIC which is not an easy process.
So i decided to land first alone (we both are in canada now) by entering to US by road. After a month while returning to canada, my wife would do landing.
But only question comes to my mind, what if emmigration officer asks me that where is my wife why she is not accompanying you? Can i tell him frankly she will doing later or she is not well now