I think you need to provide a lot more information to get useful suggestions.
What is your truck and trailer and what are their specs including payload and axle ratings.
Weigh your units to get weight with truck only, both with no WD and both with WD. You need axle by axle weights.
From that you can determine tongue weight. Then you will know if you have a properly sized WD setup.
Measure truck front fender heights with no trailer and then trailer and then trailer with WD. Then you will know if WD is set up right.
WHat tires do you have. WHat pressures do you have them at.
I tow a 30 foot trailer with a 1500 Chev and have done so for the last 7 winters. Last winter we travelled 18000 km - a lot of it towing. I do not feel the transport bow wave when getting passed. Moderate cross winds are no problem at all.
Going through all of the above will let you determine exactly how you are set up and will allow useful help from this forum.
Otherwise the answer is get a 1 ton.