I have the 3.92 gears. Power delivery is great.
Last year I towed a Wildwood XL by Forest River 201BHXL. I use a Fastway E2 WD/anti-sway hitch and added AirLift 1000 bags. Big Horn package came with integrated brake controller.
This year I upgraded my camper to a Keystone Passport 2400BH. The "dry" weight is about 800 pounds more, but still right at 5K. Its GVWR is less than my old trailer's, primarily due to two reasons: 1) Less capacity for cargo (roughly 2k, still sufficient); and 2) New trailer is metal framed and fiberglass constructed.
Trailer GVWR is 7,000 pounds. My tow capacity is 10,200.
The new trailer is roughly 4-feet longer, which has me concerned a little about sway. But it also has a "spread dual axle" design for towing stability. Additionally, I replaced the "china bomb" trailer tires right off the lot. I chose Carlisle ST Radian HD tires with D load ratings for the trailer. The speed rating on those is 81mph.
I'm going to stick with the AirLift 1000 bags for now. However, since last camping season, I upgraded my truck tires from P to LT (D rated). We have a 2,000 mile road trip from Utah to Oregon planned next month with the new trailer. Before that trip, I'm adding Trailer Ridge towing mirrors and a Hellwig sway bar.
All things considered, I think my truck should be setup well for this trailer.