Hi drpepper68.
As mentioned in above posts, any trailer (utility, RV, Boat) should always sit level when "average" loaded. re: Its visual stance should be level - on level ground.
Unknown to some folks, leaf spring packs loose their arch shape in time. A factory trailer would have 2" distance from its tire to fenders. And 20 years later, that same trailer would have a 3/4" gap. Natural sagging of up to 1.5". And during this time, their leaf springs become brittle as well. Thus, high risk of snapping when hitting double railway tracks at high speed. Solution: Replace leaf spring packs (with "next size up" weight range and) with same factory arch shape. Thus, making your trailer's suspension better than factory.
Since you have a 4x4 "high clearance" Tow Vehicle, I would simply re-install the boat axle "under" its leaf spring packs. Thus, raising the trailer 3-4" higher off the ground. By increasing boat trailer's frame ground clearance, you also create better "stance" - when connected to your 4x4 Tow Vehicle as well. Higher trailer side effects? Simply back further into the water. If wondering, I did an "axle under leaf spring packs" change on my boat trailer and simply back the trailer until its fenders are near 75% in the water - instead of its previous 95% in the water. Tow Vehicle rear tires are often touching our only 2" in the water. But, my boat's motor keel area no longer has high risk of dragging. And, its visual stance (connected to my high Tow Vehicle) is 100% better as well.
Above might help for your combo as well.