alignment
First, these is my and only my recommendations; they are not endorsed by anyone. Camber needs to the straight up with a conventional suspension, rear wheel drive, for a vehicle used mostly on highways. Some vehicles have excessive camber gain to prevent tire scrub during great suspension movements. Then there is front wheel drive with power steering with its problems. With the large anti-roll bars on most motor homes, wheel deflection is greatly limited.
On to caster - more the positive caster, the more the steering wheel will stay centered, hands off. Positive causes the front of the coach to be lifted when the steering wheel is off center. This force is known as the centering effect. The more positive caster, the more the effect is felt. Excessive caster can cause tire scrub when the wheels are turned off center, so there is a happy medium (personal preference) in caster settings. I like 5 degrees in my cars without power steering and 6 degrees positive in the Hurricane.
Lastly is toe. Excessive toe will cause fast tire wear. Toe-out will make the vehicle turn great and quick, but tends to make the vehicle darty and unable to hold a straight course, especially when at speed. As much as 1/2" toe-out is used in autocross racing, so the car cut (react fast) going into corners. Toe-in makes the car track straight and makes it lazy (slow to react) when the steering wheel is turned. I like 3/8" toe-in over one tire rotation - 33". Yes, the tires will wear out faster. Probably in less than 50,000 miles on my coach, but with 7 years and 42,000 miles, it time to change the tires anyway. I did not speak to king pin angle. For all practical purposes on an F-53 chassis, it is fixed and was figured into all alignment calculations.
