Just got my first TT home. Beginner questions.

No. 4.. Once you find the level you want inside the trailer, and you have checked it with your level, your loved one, and even rolled a marble on the floor, then get two small bubble levels and put them on one corner of the trailer on the outside. Mount them so they are perfect, the way you want the trailer to sit, and the bubble position reflect that.

After a while, you will trust them, and you won't have to keep running inside to see something on the fridge.