Assuming you won't have advance access to the winners: Do the formatting with placeholder winners (last year's, or obviously imaginary ones) before the con. Then do one of the following, depending on what combination of convenience and security works best:
1) Give the formatted file to the Hugo administrator, have them plug in the actual winners after the voting closes, and have them give the file back to you after the ceremony, and then you'll require a minimum of time to upload the file.
2) Or, if your time is even more limited, and the administrator's not so much, give them the formatted file and the keys to the website and have them upload it.
3) Or, if the administrator's availability is more limited and yours a little less so, you needn't involve the administrator at all: do the formatting with placeholders beforehand, and then type in the winners right after the ceremony. That way you'll have to spend the time typing it in, but not the time formatting.
This is approximately what Mark Olson and I invented for the newsletter in '96 and has been done in subsequent years. He gave me the layout format for the newsletter, I plugged in the Hugo winners pre-con, and then I gave him the master under embargo just before the ceremony, and he spent the ceremony time running it off, so it was ready to hand out to attendees as they left the hall.
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1) Give the formatted file to the Hugo administrator, have them plug in the actual winners after the voting closes, and have them give the file back to you after the ceremony, and then you'll require a minimum of time to upload the file.
2) Or, if your time is even more limited, and the administrator's not so much, give them the formatted file and the keys to the website and have them upload it.
3) Or, if the administrator's availability is more limited and yours a little less so, you needn't involve the administrator at all: do the formatting with placeholders beforehand, and then type in the winners right after the ceremony. That way you'll have to spend the time typing it in, but not the time formatting.
This is approximately what Mark Olson and I invented for the newsletter in '96 and has been done in subsequent years. He gave me the layout format for the newsletter, I plugged in the Hugo winners pre-con, and then I gave him the master under embargo just before the ceremony, and he spent the ceremony time running it off, so it was ready to hand out to attendees as they left the hall.