The only launches that I am aware of is at Nenana, and Rosie Creek. Rosie Creek is on Chena Pump Road, quite a way to the Wood from either. The mouth of the Wood is sometimes hard to find, it breaks up into so many little channels that are not deep enough for most boats. The area you are talking about is nothing but swamp, an air boat is the only way into that area that I am aware of. And on opening morning airboats are all over that area. I went there once and won't go back due to its inaccessiability and the overabundance of air boats.
Hate to sound so negative! My I make a suggestion? Once you find an interesting location, go to thye map department at UAF, They have satallite photos of most of Alaska. You can really tell a lot about an area from those photos. You don't have to buy the photos just to look at them. All the pot holes and swamps really show up on those.