Is that a 3/4 ton? Is it 4 wheel drive as well? If you add weight for fuel or water you may start to push your rated capacity. The triple axle trailer will help a ton with stability, and 146 miles is not really a terribly far distance, so long as the trailer is in good working order. Would not recommend a load distributing system because that will not work well at all with the surge brakes (unless it's one of the rare systems that is designed for surge brakes). I think if you have a 3/4 ton, you should be fine, if it's a 1/2 ton, it might be a little uncomfortable/not safe.. I had a 29' Larson I pulled quite a few long distance drives with my 3/4 and was perfectly comfortable with it running 70 mph, but my half ton truck I had before, it was a white knuckle affair and prompted the need to upgrade to the 3/4.. She would have been a bit heavier than yours though. 4 wheel drive may be important for the ramp operations. Basically, in your case, what I'd do if it is a 1/2 is pull her out and drive it around locally, before your trip, and see how she feels.. With the surge brake setup, I'd make sure I gave myself plenty of stopping room.. What's the beam on that boat? Legally speaking, if it's over 8'6", you should permit for it, but the fact is, most cops just aren't going to mess with some guy just pulling his boat for recreation, unless you do something to warrant that kind of attention..

The beam is exactly 8'6" so I'm good legally but it's intimidating thinking about keeping something that wide in my lane. Thanks for your advise.

What lake are you going too?

I have this exact same boat and while I don't have the spec sheet in front of me, I calculated it at about 8,500 lbs with water and gas. I think you could make the trip, but I wouldn't want to tow that distance with that truck on any regular basis. Definitely go with a weight distributing hitch. They're worth their weight in gold and they absolutely do work fine with surge brakes. I've been using the "Equal-i-zer" with mine and you would never want to tow a boat of that size with that truck without it. Reese makes similar weight distribution products.

I tow a 255 Sundowner that weighs in at 7100 lbs with the trailer. I use to tow it with my V8 4-Runner but that was not such a good idea. I now tow it with a 3/4 ton pickup truck with 4 wheel drive. I think that going 150 miles will be easy with the truck you describe. The most important thing to do is slow down and get to know how your truck tows. The condition of tires, shocks, and stiffness of the suspension all play a part. Towing at 60 mph may not impress your friends but you will arrive at almost the same time as if you towed at 75 mph. Slower is safer. The faster you go the more likely it is that things start to happen faster than you like or can control. You will be pushed by the boat going down steep hills. So start downhill going slower than normal and do not exceed your safe speed.

I think that you will be fine if you take some time, take it easy, and learn how to react to wind gusts, semi trucks passing, and keep alert. I tow a boat the size of your about 2,000 miles a year and the only concern I have is to make sure the truck and trailer are working perfectly before I leave home.