Hi DJ,
Given you don't need a huge amount of solar power, and have a pop-up so probably don't want to mount a huge amount of kit up there, I would go with the largest single panel I could get for a good price. I have two 80 watt panels, but you can get larger.
My logic is that there is no more work involved mounting one large panel than one small panel, so you might as well get as many watts for the effort you are putting in.
Clearly I live somewhere where I don't get as much sun as you (52 degrees north, so low sun angle, when there is any sun) and my compressor fridge is a lot more power hungry than an Engel. Hence I have 160w of solar.
This is what I installed:
Steve's solar stuff...Steve.