I will take some pics of my spread this weekend and send them to you. I do both types of trolling from the sides of my boat forward of my side console. Its easier for me when Im solo and I like that I can sit on the front deck looking back towards my spread or when my back hurts i can sit down on my bench seat and look forward at my rods.
I run an 8 rod spread with 16, 12, 8, and 7 lengths. Longlining I can narrow the spread to 2 between rods if I have an extra set of hands. Im probably an anomaly in that I use PSTs for my long rods for both applications and change out from line counters reels to my longlining spinning reels. For my onboard rods cranking I run a 7 Ugly Stick cal1100 medium action trigger rod and for longlining I use an 8 Pinnacle Limit that I cut down to 7.