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Here's a tip: It'll take two of you. Get some webbing, like seat belt or better still a cotton variant thereof - it doesn't slide around as much as seat belt does. Make a small loop in one end of the webbing, and using that fashion it into a lasso. Pull it tight around the object that's due to leave the attic, and lower it down to the person below. Rinse and repeat. Me and my sister cleared our parent's loft in circumstances similar to your's in next to no time. No climbing up and down stairs/steps. We're both beyond retirement age.
Honestly the thing i'm dreading most is going through the stuff in the attic, it's chocca with stuff and getting in and out through the hatch on at tiny landing at the top the stairs makes it harder.