Do you have a nice level hard surface to accomplish this? If so lifting your vehicle and supporting it on jack stands will afford some room to work. Removal of rear and front(if so equipped) driveshafts, removing the converter cover, shift linkage, and tv cable. Removing the torque converter to flex plate bolts, this will require turning the flex plate over to get to all the bolts. The trans cooler lines from the pass side can be taken loose along with the tc lock up wiring. You might think about using a flare wrench to avoid damaging the fittings. The support of the trans become important at this point. A good trans jack or floor jack with a trans adapter or just a floor jack and 2x6 if you are careful. The trans is heavy and if it has a transfer case hung off the back even moreso. The crossmember and trans mount can come out along with the bell housing to engine bolts. You might also remove the dipstick and tube at this point to avoid damaging it. Being careful to avoid damaging any wires and tubes lower your trans out of the way. You should then be able to get to the freeze plug.
Use your best judgement. This might not be for the first timer. Doing this or any repair involves risk. You take any responsibility for damages or injury.