In my experience wood frogs are actually not the easiest species to keep long term, after a few years they develop major health problems on a diet of standard feeder insects (lipid keratopathy, obesity). They also do not breed readily without being freshly collected from the wild (and retained eggs compound the health problems), and would only breed once per year for you. For native species, green frogs (Rana clamitans), or gray treefrogs (Hyla versicolor) are much more prolific and hardy captives which I've bred for several generations in the past few years.
Hyperolius argus is a species of African reed frog that we've started keeping at the zoo. They reproduce consistently and would provide a fairly steady stream of small tadpoles. Tyrone Hayes at UC Berkeley uses this species as a developmental bioassay, so it must breed just as well for him. Some of ours (wild caught) did test positive for chytrid though, so you'd definitely want to treat them thoroughly before you start using them for food. They are a very interesting frog as well, males are translucent green, females are dark red/orange with white polkadots. Babies look very similar to glass frogs.
-Tim