If you plan to do a lot of boondocking then you need some way to monitor the batteries, so the trimetric would be a good investment.
I would say with only 200 watts of panels there is no need to replace the solar controller.
I have two panels that are portable, there are a couple of advantages to this.
1) I can place the panels where they work most efficiently, throughout the day. This allows me to usually recharge my batteries by about 2:00pm.
2) I can park the trailer in the shade, which keeps the trailer cool and further reduces energy consumption.
Of course the down side is that you have to store, setup, and move the panels.