Trust me, after going through all the hoops of applying, landing is straightforward, quick and easy.
Landing is simply a formality to finish routine paperwork on your file. As long as you haven't changed your status or done anything weird/illegal since you were granted the visa everything will be fine.
I recall the questions are something like...
1. As anything changed in your status since you received your COPR (i.e., did you marry, have a child, etc)?
2. What is your address in Canada? I understand you have an option of not declaring an address until you settle permanently. I think they give you paperwork for sending your address later, but I'm not sure, and you apply for a PR travel document to come back.
3. Is everything correct (name, birth date, etc) on this printout?
It is VERY common for new residents to land and quickly return to their home country to settle affairs. They will not have a problem with where you plan to stay or for how long. These issues will have no effect on whether you are given PR. Just be sure that you return in time to fulfill your residency requirement of staying 2 years of the first 5 in Canada. After that, the requirement becomes 2 years within the previous 5 years and has a rolling timeline.