I used to work for a bee outfit and we would move the bee boxes at night.They would still boil out of their boxes and sting you.Wasps are more aggressive and can sting more than once unlike a honey bee.I have brought several wasps nests home.You need to climb your tree when it is still dark out.Be as quite and move as slow as possible.Try not to create any vibration.Wasps hate black and will sting the heck out of you if you are wearing it.Also they hate alcohol so don't drink before attempting this.Use a burlap sack and a can of wasp spray.Cover the nest with the sack and tie shut.If any come boiling out spray the heck out of them.Good luck.If you don't get bit you will be lucky.If you only get bit a few times you will be lucky also.I know this will work have done it several times.Baking soda and a little water helps after you get bit and so does witch hazel.If it were closer to the ground I'd say just spray it.
Good Luck.
Elkshed.
P.S.If you have somebody video tape you you might win the funniest videos.