Do any of MikroTik CRS support LACP Bonding in hardware or only on the CPU? It seems the answer is no, but just checking. I know the CRS can do "Port Trunking". Which I'm not exactly sure what that supports....

Nope. Still the main thing holding me back using MT for switching duties.

Maybe ROS7 xD

LACP is supposed to be supported in the new version of SwOS (I think version 2.1 and up), and should be supported in a future version of ROS, but only on the CRS 3xx series switches (I think, could be wrong). The current port trunking is static link aggregation, and is not compatible with LACP.