Basics first before anything else. Load it just like you would for a trip same number of people same amount of water in the fresh water tanks so on so on. Store everything as if you were on a trip and passengers where they normally are. Then go get it weighed you need front axle weight, rear axle weight and total weight. If you front axle weight is not at least 75% of the maximum front axle weight you WILL have handling issues. If this is the case go home and rearrange your RV. Every pound of weight that is located behind the rear axle will take weight off of the front axle the farther back the more it takes off . I am a fan of always carrying a full tank of fresh water but if your fresh water tank is behind the rear axle you might not be able to do so. After rearranging your load take it back to the scales and reweigh it. Continue to do this till you reach 75% or more.
If the you have 75% and still have handling issues make sure that you are not overweight for the total RV that to can cause handling issues.
Still have problems check your tire pressures and adjust according to the weight on that axle.
Still have problems take to a good light truck alignment shop still loaded and have the alignment set.
Still have problems replace shocks.
These are the basics that IMHO must and should be done before spending money on upgraded components.