Hey! We're in the same boat! =) I will also be flying in to Canada in 5 days to be with my fiancé! Then we'll get married first week of May then submit our application afterwards. I'll be staying with him while waiting out the process, then plan to apply for extension before the 6-month mark is over. It makes me nervous just thinking about what to say at the border!!
How about you? Do you plan to stay with your fiancée until your PR comes through?
I'll share with you what I'll do based on what I've read and what others have told me.
1) Pack all your things in suitcases. I plan to bring 3 luggage with me. Dont use boxes since it gives an impression that you're moving to Canada. I'm not sure if you're flying or driving across the border, but dont bring furniture or appliances with you.
2) Arrange a return plane ticket or an AMTRAK ticket to get you outside Canada. You have to let them believe that you know that your stay is temporary and you intend to leave Canada when you need to. I plan to buy a refundable ticket for September so I have something to show to the agent then cancel the flight when I get inside Canada.
3) Prepare proof of employment after your "trip", if you can. My previous employer had been so kind to write me a letter that she approves my trip to Canada and my job will be waiting for me after my "vacation". Of course, I have no plans of going back.
shhhhh!
4) Prepare other documents that you have ties to the US, like your lease or bills or bank statements. I have no lease or bills since I'm living with family. But the bank statement could show that you can financially support yourself during your trip..
5) Bring copies of your completed or partially completed application and have your receipt ready. I'm planning to show my application form from my laptop since its not yet 100% complete. I also paid for the fees.
6) Be honest at all times with the border agent but don't offer too much information unless asked. Also, dont let your nervousness show! I'm planning to tell the border agent that I'll be getting married to my fiancé on May, we'll be submitting our application for spousal sponsorship right after, then I would want to stay with him during my visit to Canada. Then depending on my feel of the agent's mood that time and whether I'm feeling extra gutsy, I'll go ahead and ask for a 1 year visitor record.
They also would want to hear that you understand that you are not yet moving to Canada and you are not allowed to work or study during your stay. If they ask for additional proof, I'll show them my receipt for the application, my application forms on my laptop, the letter from my employer, itinerary of my return ticket, and bank statement.
I hope I covered everything and I hope I didnt misinterpret anything. =))