For fun: I'd throw my Avenger SS and try to work a roller out of it.
For Reals: I'd throw my 150 Tsunami because it gets all its distance from speed and glide and doesn't light height at ALL.
I don't normally carry that disc in my Crunch Box...so unless I had my tourney bag with me I wouldn't even HAVE that disc with me...so let's be realistic.
I'd throw my Stalker and by trying to avoid that tree I'd only get about 200-300' out there. Then I'd probably throw either my champ wraith or wasp depending on the line I had to take out of there.