Tire Pressure on a long trip

[wilco]

I am taking a 1000 mile trip This week with my Deuce. All highway until I get there. I will have less than 1000# in the bed. The front I think I should keep at 50lb. I would like to drop the pressure on the rear to give a little less jarring ride. Any pressure recommendations?
11.00-20 singles with front and rear axle hubs free wheeling...

 

[BEASTMASTER]

11:20's should be around 70 lds. running them soft will make them heat up and possibly blowout.plus they recomend stopping every 4 hrs. to let the tires cool down. good luck