If possible, you could visit alone first.... then wait for a few months before applying for your family for maybe a summer holiday. You'll need to work hard to prove they must return to Pakistan to offset the 'Family ties are stronger to Canada' reason.
Also, prepare a travel itinerary which would be Pakistan >> Canada >> USA >> Canada. You would need to include bookings (tentative) + proofs of visit to the US.
Also, you must prove that you must return to Pakistan by a specific date = They must leave with you.
Do post the list of documents (separate for each applicant) if you need advice
Ok i got ur point. I will share the details point by point with you here.