It seems that the group has been given permission to camp out at the Riverdale Museum -- which gives them the unique opportunity to tour the facility, check out the exhibits, -- and witness the surprise delivery of two mystery sarcophaguses -- or is it sarcophagi??
Jughead is a little freaked by the mystery mummies and by a giant fossilized dinosaur, but otherwise the night is going well, except...
It turns out that the museum has a crooked security guard! Those sarcophaguses... er, sarcophagi... Those mummy boxes actually contain a couple crooks who plan to loot the museum's famous Odessa Stone! But now they have to figure out how to get rid of the Adventure Scouts so that they can steal their artifact.
Looks like they stole a move from "Scooby-Doo!!" But these guys most likely will make this work. After all, the boys left the dogs at home and they don't do a lot of amateur sleuthing!! And what hope do the kids have of making it out unscathed if their teen chaperones can't keep their cool??
I'll leave it up to you to see how this story resolves itself. But you should definitely check it out. "Mummy Mayhem" is written by Bill Golliher, penciled by Fernando Ruiz, inked by Rich Koslowski, lettered by Jack Morelli, and colored by Barry Grossman. This story was a lot of fun and this artistic team was definitely having a lot of fun when they crafted this tale!
Check out ARCHIE JUMBO COMICS DIGEST #255 to read this story plus numerous other fun reprints from Archie Comics' past.