Archusa mini mart sells minnows. It's the gas station close to the bridge that crosses the lake they also have premium non alcohol gas as well
Boat launch is around $10 I think but really don't know exactly as I have purchased the life time pass. Lake is down now but people still able to launch boats but not as easily as when water is at normal height. Hope this will be a help to you. Be careful as lots of shallow areas during lake draw down.