I like to think that I am a bit of a container gardening expert, because I have very little real dirt, and have been growing al kinds of stuff in pots for years. Mostly on our seond story deck. Veggies, herbs, annuals, some perennials etc. Use the light weight container soil for sure, but put some of your own compost or bagged stuff in it too.
Containers are also quite disease and bug free and easy to maintain.
I have no space on the ground. And light weight is important - just as Carol has discovered. And I'll send Carol a picture of the jungle that I create annually.