Help me to choose the right cam

Tire size has a huge effect on gear ratio.
Take the average of 3.55 with 26" tires would turn 2700 ish rpm @ 60 mph now move up to 33" now 4.56 would turn the same rpm and 36" would need 4.88. In effect all 3 of those combos are the same final gear ratio. If you run 3.55 with 36" your basically lowering your gear ratio to 2.54.
With a torquey 440 is doable depending the weight of the trailer but I'd go with 4.10 at least.