Head over to
http://www.visajourney.com/forums/ and check out the
K1 forum and read the stickies at the top of that sections lots of super FREE info! It is a forum, so good and bad advice of course, but for the MOST part it is excellent! Take ur time and read, and do a search, 99.9% of the time the question has been asked, and yes, the search feature is a bit lacking, so ask the question a few different ways,lol. I didnt come in on a K1 but here is what I know (not gaurenteed to be accurate:
K1 (fiance based visa) thus you CAN NOT marry until u pass the interview in Mtl or Vancouver, Well u can, but then have to start all over again doing a K3 or CR-1 (relation visas)
- it is a ONE time entry, this once u enter the USA and activate it, you just cant decide to go outside of the USA (including Canada!) until u get ur AOS complete or ask for advane parole (AP)
Was one gal on visajourney (VJ) that was on a K1, didnt get the required paperwqork (AP) to leave the USA, and got denied entry! Thus she had to do a K3 or cr-1, right from the start!
And if u had enough hours in Canada to get Employment insurance (EI) u CAN get it in the USA! There is a section on VJ in the CANADA section that deals with that!
There is a lot more info and more accurate on VJ, so give it a read! And its pretty much a NO to bringing ur stuff across the border until u get the visa! Unless its a small crossing anf u know the guards. And u can visit the usa while the process is going. Ensure u have documents proving u have ties to Canada. Always answer their questions TRUTHFULLY If ya dont, that could lead to HUGE problems, always be honest! You dont have to tell the guards ur whole life story. Keep ur replies short and to the point, but truthful! Best of luck