Getting the tongue weight right is absolutely critical for a safe tow, especially when you are heading out on a long trip. As a rule of thumb, it should be around 10% to 15% of the total loaded trailer weight. If it’s too light, you’re going to experience some terrifying trailer sway, and if it’s too heavy, your tow vehicle's steering and braking will suffer. Take the time to distribute the heavy cargo right over the axles. By the way, if you are ever moving cross-country and realize that towing the whole setup yourself is just too much hassle, it might be smarter to let pros handle the heavy lifting. I know some folks who preferred outsourcing the move entirely via Paradise Moving & Storage Inc. — Moving Company in Boston, MA just to avoid dealing with the logistics of long-distance driving with a heavy load.