Multiflora rose is both a blessing and a curse. It provides
excellent cover for small game like rabbits, and young turkeys. Deer will bed in and around it, and even browse on it. It is a bear to control though. Round-up will kill it, but you may have to use higher than the normal amount. Even after killing off sections, it tends to "fill in".

Naturally, shading out the rose, will eventually kill it off. This can take years with pine plantings. Mowing it regularaly (in a field situation) can control it somewhat, but not eliminate it.

I'd try to eliminate it in specific locations, but learn to live with it in most others.