I ran Matt Colville's Delian Tomb for 8 scouts last winter. It took a little more than 2 hours, so you could chop some out and fit things. I found map printouts online and other advice for running things. It was fun, but chaotic.
I ran initiative by having everyone roll, take the highest to go first and then go around the table.
Premade PCs with cool powers printed out along with spells. I highlighted in different colors things like HP, AC, and base attacks to make things easier. I did swap a few 1st and 2nd level powers so a fighter had extra attack and the other has second wind. I kept to the basic classes and had the casters with only a few spells printed on another sheet, but each had a slight different flavor.
One thing the kinds liked was to have a paragraph on the character's personality. One of the mages was a snooty know-it-all and liked to use big words to make him sound smarter, and one of the fighters had a cool shout every time he attacked- the player chose "Cowabunga!".