That is what I do,
I make five copies of everything they ask for.
Then I put it in one of those little three ring binders that has the clear plastic cover over it like you would put something in school for a report.
Then I have a large envelope that I put all the originals in.
I sign everything in blue ink so it will stand out and they will know that my sig. is not copied.
I also order everything as they say or as their interview packet came to me as.
I just assume when they send you a list of things they want, there might be some kind of order they want it in, so I just go through it.
I was met with real good results that way.
I also know that most people that have to fill out apps to bring in with them that they take the time to type in the answers.
One thing you might watch for if they send stuff that needs to be filled out in .pdf files, you sometimes can fill them out on the pdf itself and then print.
Then the breifcase thing is right. I could not afford one that was leather or anything, but as long as you can keep your paperwork organized and find something the ask for instantly in there, then I think you would be alright.
Reeves