The 8 foot ladder will fit through the attic access, won't it?
The other thing is, I would totally use a 6 ft ladder, because the attic access would give me enough to hold onto to get up in the attic hole from the very top step. I used to have a job that I used ladders all the time, so I'm used to moving them around while I'm standing on them. The top step CAN hold you, but it's just not the wisest idea. Get a friend to hold the ladder, especially when you come back down. You may have to hang drop a little.
The other thing is to rent a 12 foot straight ladder and lean it up into the access hole, and viola! Stairway to heaven.
Karen
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insidious ungovernable cardboard