With a 27'/6500# 2016 Jayco and 2016 1500 Maxx tow package Silverado , I followed these general steps and just completed a 3000 mi trip with zero issues. Average speed was 60-65 with quick bursts to 70. The effects from crosswinds and bow waves were minimal.
Start over taking measurements and decide then if heavier bars are needed. The 1000# bars you now have should give you an good idea of a proper tow feel but heavier bars would probably a better choice having less stress on them. If you use too heavy a bar, you will feel a harder ride.
http://davidsrvtips.blogspot.com/2009/02/hitch-setup_2781.htmlwhen you have the time .......
read Ron's posts
https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/14265335.cfm