I had thought about that, but would need to hire some professionals. I have 25 acres of switch that we manage with fire, but the timber burn may be out of my league. I would be worried about it getting into the switch, or the neighbors....or burning for longer than I can babysit it.
It's easy-peasy. I have created fire breaks in the timber with a backpack leaf blower and never come close to losing contain. (I have had some trouble, in the past, out in the CRP/grass, FWIW.) For an even better fire break in the timber...can you drive a mower, even a lawn tractor, through the timber? That will create a great fire break in the timber. You will have bare soil and be good to go.
Timber burns, in my experience, are much more easily managed as the fuel is only as high as the leaf pile is deep, as opposed to the height, as in inches, of the grass/brush in a field burn, which often has grass several feet tall. Much lower flame height and slower burning too. Most creek drainages, however small, will stop a timber burn.
Timber burns -
1. Using a leaf blower, and/or mower, create your outline in the leaves. 3' is generally wide enough, but I often go a little wider just because.
2. Obviously, remove all flammable material that is laying on and/or across the border.
3. Walk through the area to be burned and blow the leaves away from any brush piles and standing dead wood that you don't want to burn. I also usually make sure that there isn't a big pile of leaves touching my good trees...as I don't want to burn too hot next to them and "girdle boil" the base of the trunk.
4. Light your fire on the downwind edge and manage it via the blower(s)...when it has crept, I dunno, 10' or so into the wind...you can scoot over the upwind side and light it up.
Bonus - If you do burn in the timber, be sure to check that area for morels at that time too. "Disturbed soil" via fire can spark a nice mushroom growth too.