Cargo Indicator workin last I checked.
Remember, a cargo has to be selected for the indicator to appear.
The Cargo Camera was decommissioned but revived in Holton181's mod https://forums.eagle.ru/showthread.php?p=3622861
If you use it, remember it only comes on when you're airborne.
Also, check out "Cargo View" in View Category. The vanilla version of this view can be disorienting. A fix for this, however, can also be found in Holton's mod.
Have fun.