Weight weights would certainly help in this regard. I have them for my BX and find them amazing.
Most folks here will likely tell you to fill your rear tires. That is an option, of course.
A simple weight ballast is easy to make and won't get in your way like a back blade or box blade does in tight quarter. Guys have stuck a rod through a 20 gallon garbage can ($12) and filled it with quick crete. ($20). In tight quarters, a ballast box of some kind makes sense. In the wide open, an implement makes an excellent ballast. BTW, only ballast, not weighted wheels or filled tires is going to take weight off your front axle, through leverage, which is also important.