Calvin Finch suggests determinate varieties of tomatoes for fall. Buy a large plant ($3-$5 size, one plant per adult) from the following varieties.
Tycoon
Phoenix
Solar Fire
Sunpride
Heat wave
444
Celebrity
Also each family should bring a 40 pound bag of Gardenville compost/mulch.
These items should be available at the following nurseries.
Shades of Green on Sunset
Schultz Nursery on Broadway
Arbolito's on San Pedro
Charlotte