Now that I'm home and have the book in front of me, here's more detail about the sample party from the AD&D
Dungeon Masters Adventure Log (which, btw, is worth picking up as a curiosity if for nothing more than this sample party and the 4-page "centerfold" showing what the various AD&D weapons and armor types were supposed to look like ("so, umm,
that's what a lucern hammer is?"

) -- plus the Erol Otus cover illo is beyond awesome):
Characters:
Fred 9802 (Player: Dave Cook) Male Dwarf LN Fighter 5th
Knock Grafton (Player: Helen Cook) Male Human N Thief 7th
Black Dougal (Player: Kevin Hendryx) Male Human LN Ranger 7th
Harry Furryfoot (Player: Jeff R. Leason) Male Halfling CN Fighter/Thief 6th
Illysio Morningstar (Player: Steve Marsh) Female Half-elf LG Fighter/Magic-user 5th
Yolanda Mirabilis (Player: Jolan Moldvay) Female Human NG Magic-user 6th
Sister Rebecca (Player: Rebecca Moldvay) Female Human LN Cleric 7th
Morgan Ironwolf (Player: Tom Moldvay) Female Human CG Fighter 8th
Elron Hubbard (Player: Lawrence Schick) Male Elf CN Magic-user/Thief 6th
Lakesla (Player: Jean Wells) Female Gnome LG Illusionist 7th
(the sheet also shows the AC, hp, combat adjustments, and magic items for each character, but I'm not going to type all that up)
"Unusual Events":
*Morgan Ironwolf's Const. +1 from magic chair
*Fred 9802 talked back to Odin -- and lived!
*Black Dougal slain by Fire Giant
*Knock Grafton pocketed Ring of Delusion without knowledge of party
*Sister Rebecca falls in valiant combat with a Black Dragon
(the sheet also shows a record of all the monsters the party fought, the treasure they recovered, their marching order, and who carried what light sources but, again, I'm not typing all that stuff up!)
Interesting to note that Black Dougal's class (ranger) and alignment (LN) are incompatible, and that the multiclassed characters only have 1 level listed (and if that's supposed to be their level in both classes then Harry Furryfoot is past the level limit for a halfling fighter...). Careless editing, or evidence of house ruling within the hallowed halls of Lake Geneva itself?!
I don't know whether any of the others have been verified, but Illysio Morningstar at very least was an actual PC of Steve Marsh -- he sold off the character sheet on an ebay auction a couple years back (and it was discovered that, among other things, she had a 3 Wisdom!)