Nets and lions are no-nos for sure, the secondary container is good. Large bowl with with strainer in it is even better. They are slow movers and not to excitable usually so scopping isn't difficult at all. I have moved mine a few times with no problems at all even with lots of LR
. If he's small enough, I used the plastic lid off a 50pk CD-R bundle.
With any new buy the most convienent way I find is to prepare a waterchange at the same time. Have your water mixed and ready. I use a 14G rubbermaid for my waste water and start a drip into it for a few hours then dip the new addition into the display. I finish draining that way I am sure to dump all bag/store water with my wastewater and then finish with the change.