Explain everything as it really is.
1-2) PCC and communication proof is easy. They enat pics of both of u taken after marriage of outings, family get togethers etc. Include evidence of all modes of communication between you and spouse: Skype screenshots, screenshot of whatsapp messages (8-9 per month of various times during a month), screenshot of whatsapp call log, emails, communication via Facebook.
3) submit letter from the family members of reason as to why
they could not attend the wedding and that they are looking forward to hold the walima function and celebration once their daughter in law come a to Canada..
4)Explain the reason and submit related proof. If you could not get vacation, then submit letter from employer stating the reason. If u plan on visiting your spouse in the coming months you can add that as a proof.
5) Show the planning that you have done for the Walima. Quotes from places you want to hold the walima, guest lists, rexeipts for shopping that you have done for walima etc