You can put as much or as little tension on the bars as you want. Did Sean recommend the 1400 pound bars? If so just put some tension on them to bring the FRONT wheel wells back to about the same height as before you hitched. It will make a difference in the handling if you don't put some weight transfer in. It takes some careful experimenting to determine how much to raise the PP spring bar jacks. I use 5-6 inches on my setup with 1000 pound bRs to get good handling and eliminate porpoising under way. The bars aware there for a reason.
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'The Silver HamShack' (2007 International 22FB CCD 75th Aniversary model)
Multiple Yaesu Radios inside and many antennae sprouting from roof, ProPride hitch
2012 shortbed crewcab 4x4 Toyota Taco TV with more antennae on it