2 weeks back I went to Canada to get my HIB stamping and since it was my first time, they asked me wait for 3 business days before they gave back my passport. Other than waiting for 3 days, there was not any problem. They gave us a handout before the interview stating that some HIB visa applicant might need to wait for 3-4 business day. It also states that if we cannot wait for that long then we should not go forward with the interview. It also states that if you have been out US for less than 30 days, then you can reenter again using your valid I-94. The problem is you should be able to wait for 3 business days or more. During the interview, they asked where did I graduate from?, what was my job? How much did I make? and How long have I been working?  They also took my finger prints for all the 10 fingers. The only thing that worried me was I have been in US for a long time and have not been to Nepal since I arrived here. I have never been out of status or have any criminal record.  All they want is the valid passport, HIB acceptance (I-797), proof of employment, application forms and the bank recipt for the application. Rest other supporting documnets needs to be shown if they asked for it. It is better to take all you pay stubs and bank statement for last 6months, H1B petition copy, LCA, graduate certificate, transcript, previous I-20's, OPT card, current resume, any skill certificates, client side letter(if applicable) and high school transcripts. There is nothing wrong with taking more documnets to support your case. Later when I asked them the purpose of waiting for 3 busniess days, they told me that it was to verify our EAC numbers. They have a new system which does not have all the EAC numbers, so it takes time for them to verify using other system.

Moral of the story: If you want to visit canada and have fun then go to Canada, otherwise you can apply in Nepal.