To me, moving the lead is the first way to fix a mass vs volume center imbalance. Good resting frog pose (knees at 90) lets you fine tune it, but may not get you there by itself. And why not make the neutral balance point be at that 90 pose, instead of some over tucked or extended pose. (Not saying you need to use frog kick to move, but it is a good resting pose. And not 'superman' pose as that is legs straight out, which gives you only one direction to adjust.)
But moving the lead takes realizing you need to have gear that supports that, and actually getting that gear.
Traveling, I think the desirability of a balanced weight distribution vs the common dive op reality means carrying tools to fix the BC you may get. Bungee at least. Bungie or (tested) velcro mountable pockets very likely, so no one freaks about you tying weights on. Some small weights if possible, as the dive op may only have big ones. You own gear and small lead ideally.
I would trade a bit of overweighting to have a balanced weight distribution. Being easily in trim gives me more and easier control. I'm less overworked. So more aware of my environment and can handle a bit larger air bladder volume. It took me a bit to realize I think that in the right trade off. Up to a point; but it shouldn't take that many pounds tropically with a single tank.
Glad you got to dive Cuba!