There are bass in both Ponds, But try focusing on the East pond. fish at the End where the Benches and Rocks are. Use Crankbaits. or any Small Plastic worm should work. PM Me if you have any other Questions.
I've done okay catching bluegill and perch at East Salish pond, nothing larger than about 5 inches though. I'm not sure what it takes to catch bass so I've never specifically targeted them. I've been having a ball lately fishing the Columbia Slough, it's tough to find bank access but when you do it's pretty non stop action on the bullhead catfish with the occasional bluegill or perch. If you've got some flotation I'm sure you can get into some bass in the Slough too. I C&R anything I catch in the Slough, it's not supposed to be very healthy to eat anything from that murky water.
a lot of talk about Bass fishing and warm water species, The only place Ive ever caught any of these were in Coves or back water of the Columbia River any place the water comes in and makes a cove like Rooster Rock or Herman creek Rock quarry is where you find bass the LMs too Cascade locks has some bass fishing too out by the Lumber mill there there are some lake ponds in that area try there . Hood River also if you know where to go even the dalles is good around some of the pilings out there and docks.