The event will take place at DJ's Pizza in Lower Lake.
The cost for all-you-can-eat pizza is $8 per person.
Michelle Critser, her 4-year-old son David and 14-year-old son Daniel, and her boyfriend James Gerace Jr. were camping in Humboldt County last November when their motorhome caught fire.
Gerace and Daniel Critser died in the fire, and young David Critser was badly burned, as Lake County News has reported.
Presale tickets for the pizza feed are available. For more information call Jisela, 707-350-7139.
In addition, donations can be made to the Critser-Gerace Memorial Fund, which was set up to help defray medical care and other expenses.
The fund was set up at WestAmerica Bank, 150 S. Main St. in Lakeport, however, any WestAmerica branch in Clearlake, Kelseyville, Middletown or Upper Lake also can accept contributions.
The account number for the donations account is 121140218-2352175851.