Among all these number is the extreme caution to allow yourself about 1000# in the weight you CAN tow/carry and what you find in the GVWR rating of a trailer. You need room to spare for those times you may carry more water, pack heavier than you normally would or anything else that comes up. There is also a percentage to use as a guide and I seem to remember it being 80% of the GVWR, but as usual memory fails me and this may not be totally accurate. In any event, if your truck has the capability to safely tow 7000#, don't go out looking for a trailer that weighs 6700#....stop when you get to 6000#.
