Main reason I could see is frame flex causing damage to house. I would think planning and education would be a simpler solution.
Find a level spot (side to side) Mount a level on front, with bubble on center. Now lay 1 of your blocks next to tires on 1 side. Put a chock behind tire on other side. Pull out so tire is just clear the ramp, slide ramp behind tire, and back up to chock. Mark where bubble is. Repeat with 2, then 3 high ramp, then same on other side.
Now you have the level marked so you know how high the ramp needs to be when you get camper where you want it, build the ramp beside low tire, chock behind high. Pull up, move ramp sideways, and put trailer back where you want it.
If you don't want to calibrate the level on front of trailer you can lay a 2 ft whiskey stick on the floor. Lift the end to center bubble, then measure from end to floor. For each half inch add a 2X10 to your stack.
