So the trailer's rated at 4,255. Putting on 4,254 doesn't guarantee a trouble-free experience and putting on 4,256 doesn't guarantee an end to the universe as we know it (or your trip). The reality is nobody on an Internet forum can give you any advice in this situation that you don't already know, and looking for a little "it'll be ok" validation has zero impact on how your trip will go anyway. Scour the planet or just yer immediate 'hood and you'll find no shortage of folks who fudged it a bit and got away with it, and no shortage of folks that "towed" ( sorry, I had to do that ) the line and still had crap befall them at every turn.

In the end, this decision is your burden to carry here. (crap, I did it again).

Only thing I'll mention is if you do wad things up and whatnot, being over gross (if that's the case and if is ever discovered as well) will not help matters.