[Mod edit due to thread cleanup]
I find the thought of warm water travel without my own gear inconceivable but I’m not standard size.
the “average” jacket b/c is pretty floaty, couple that with the normal AL 80 found in warm water areas and getting proper weight is easy but getting proper trim not so much, a head up feet low is a product of the physics of the buoyant b/c and weight need to sink it, now add the tank buoyancy change becoming tail light and it all changes. Trim weight matters but you need to decide where you want the balance, beginning or end of the dive. A few pounds placed properly can make a world of difference but is counter productive at either the beginning or end of the dive.
everyone is an individual and while these “discussions” can feed the thought process each person needs to find what works for them and avoid locking into someone else’s “thinking” process.
the “vacation” diver will never know the difference.