On the thwart, directly in front of me I have a shockcord running the length of it and here is where I put my primary navigation tool, my map (enclosed in a case of course). This method has served me extremely well. Easy to re-position, easy to read, easy to yank out and biner to a portage pack on walks and you don't have to worry about the wind taking it away. That will stay.
On either end I had wanted to place the GPS (in its heavier than hoped for RAM mount) and the compass off to the other side. I am also keen to have the depth finder mounted more or less permanently. All this adds up to weight and complexity. I was looking at that scenario with an evil eye at first but then realized I don't mind the least bit carrying needed items on my belt and rather like the ease of access. "Thwart clutter" is much the same I suppose. Besides, my obsession with shaving 5 or 10 lbs from my kit is probably the wrong focus. How about dropping 20 lbs from my personage

. Or perhaps changing 20lbs of "stored energy" to muscle moving mass ability. So far so good.
The depth finder is the logical thing to leave behind but since my intention is to troll around the park and more or less run a line continually when practical the depth finder would be critical in doing that effectively. The last thing I want is to be continually hung up, can't make miles that way.
I can picture the GPS, map and compass mounted on the thwart in front but what I am having some perplexity imagining is where the depth finder will go and still be easily read. Since I will be looking at it probably 95% more than the GPS it should probably have a more prominent position. Add in that the RAM mount is very versatile (I could likely mount it Underneath the thwart).
I guess I will worry about that in the spring when I can get my hands on the boat. Lot's of fun!