Alrighty I give it a shot. When your in 5 feet of water you really going to scare the fish out from under you so in that pic with the red shooting up from the bottom is a tree. The other with the red in a circle shape on the bottom are rocks. Soft bottom has no red color. Also shallow water...
They where pretty active in the creeks but the lake nothing. Might wanna check your lakes out as the bluegill where all in the shallow hiding in the debris. Think they are go to spawn.
I don’t think they make it anymore but something you might wanna look into. This is what I got for the yak plus other like canoe, front of the boat. Very portable
https://humminbird.johnsonoutdoors.com/fish-finders/fishin-buddy/fishin-buddy-max-di
I do like my humminbird but I'm sure the others are good to. All depends on how much you want to spend for the features they give. Also is this for the kayak
Right now with gas prices I didn’t plan on to many long trips. Only if you guys were closer I’d be there but count me out again as I don’t think I can make a 4 or 5 hr trip. Good luck to those who make it.