If you get a WD system with built-in sway, like the Equal-i-zer, you do not have to drill holes anywhere on your frame. The L brackets which hold the bars on the tongue are U style brackets that go over and under the tongue frame and are held on by tightening the bolts between the front and back of the bracket. No holes.
This way, you have the WD system and Sway control at the same time.
Sounds like you need the sway control, when traveling empty.
Here's another thought, I realized this just this week, after towing for 30 plus years myself and my parents example from the time I was 6. You may not notice it, but if you attach your camper to your truck hitch, the back end of the truck does SQUAT down. With NO WD, the squat is still there. Do you realize when you put that weight the truck back end, the headlights are angled upward! I have WD (Equal-i-zer), but returning home from Florida a couple days ago, we traveled all night. I normally do not drive at night, but wanted to get home. My headlights were angled much higher then when NOT towing, and I have an Equa-i-zer, a 3500 dually diesel and tongue weight of about 800 pounds! One would not think with a set-up like that the slight difference in rear squat would matter! Well it did. I had LOTS of drivers coming the other direction flashing their lights at me. When I reacted by flipping on my brights, I realized my headlight angle was really way to high. This does not happen when NOT towing.
So you know, you REALLY do need to keep WD on your rig. You're experiencing sway, can't drive over a specific speed limit. When driving back roads or off road, simply remove the bars then if you want.
My advise ..... Equal-i-zer, or some other such system that does not require holes and has built in sway.
