There are no boat lanes, but there are underwater 'islands' that sometimes come up to within a few feet of the surface. If you have a hotmaps chip in your GPS/Sonar make sure you load up the topographical map.
Early this month I bumped my lower unit on something well out in the main body of water. When I talked to JC and asked about it later, he said there are also some silos that were left in place when the reservoir was dammed and filled up.
When I was in doubt, I just loaded the topo map up and ran the channel if I was going to run up on pad. Otherwise, out of the channel I slowed it down and took my time since it was my first time actually driving a boat on Amistad.
Depending on where your staying, the locals will always have the best info for you. I know when the wind was up earlier this month, a lot of locals launched in rough canyon and stayed in that area instead of venturing out into the main body. The main body can get pretty hairy when the wind picks up.
If you get the chance, get in touch with
JC Gwynne - The Amistad Man 830.719.9006, and he can give you some advice on what to do and not to do when the wind kicks up! He'll even point you the right direction to get on some fish.