You don't mention what trailer you have or are contemplating getting, but, the "rule of thumb", to avoid sway from the trailer (a very dangerous situation) you should have 12-16% of the trailer's gross weight on the tongue. With a 450 hitch weight restriction, you are going to have to have a very small trailer...
Even at 12%, you are going to be limited to a trailer that weighs in at around 3400 lbs. (you have allow for the weight of the hitch, too). That 3400 lbs. has to include the trailer and its cargo of supplies... With that kind of restriction, are you talking about a Class 2 or 3 hitch? If so, those hitches are designed primarily for bike carriers, small utility trailers or pop-up trailers. When I towed my 210WBS, my tongue weight was in the neigborhood of 900 lbs. as measured by my Sherline scale. With the weight of the Equal-i-zer weight distribution hitch, I was a tad over a half ton...
But, yes, roy was spot on. I towed my 210WBS for almost 50,000 miles and never disconnected the weight bars unless I was unhitching the trailer