The trim tabs would work, but is not cheap to add one.
I have a 2100SR 2001 and I have similar problem. I just move the loads around. The cooler, water make a different where you keep it in the boat. You can seat the peoples in different spots to.
If they respect you, respect them. If they disrespect you, still respect them. Do not allow the action of others to decrease your good manner, because you represent yourself not others.
-2001 Maxum 2100 SR2 Sport -1997 Regal 258 Commodore (Sold)