I use different setups depending on the dive. What I choose depends on these things:
1. I like my rig as small and streamlined as possible. With this in mind, I choose the smallest lift bladder that will float my rig on the surface should I need to remove it.
2. I distribute the weight for trim and when weight requirements are the highest, I use Halcyon cam band weight pockets and a weight belt.
3. If a weight belt must be used it is no heavier than 8 pounds.
4. If I'm traveling on a plane I choose a wing that packs small. I still take the appropriate plate...irregardless of weight. Even with my heaviest plate my bag stays well below the max allowed.
5. If I'm worried about puncturing the wing...like when I'm going to be tossing my gear in the back of my PU...I grab a wing with an inner bladder/ outer shell.
6. I make use of STAs because of their weight and the solid, stable connection that they provide. It also makes switching tanks very quick and easy. (Although, I am wanting to try out Tobin's STA-less solution.)
For singles:
Plates: Halcyon SS, Halcyon AL, DSS SS with or without weight plates, and a FredT 9#. Hopefully my 12# FredT survived Katrina.
Wings: Halcyon 18# batwings, Halcyon 27# Pioneer, Agir 35#.
STA: Halcyon 3#, FredT 6#.