Possession limits typically only apply to when you are travelling. A possession limit is usually two daily quota as FA has mentioned.
To make it less confusion, here is an example. If you are travelling, you catch your daily quota of fish on the first day, have them in the freezer at your hotel. On the second day, you catch your daily quota of fish again, also have them in the freezer of your hotel room. On the third day, you cannot keep anymore fish because you already have two daily quota in your possession back at the hotel. Basically at any given time, if you have two daily quotas of fish in your possession at your hotel, RV, camp, etc, you cannot keep anymore fish. If you end up eating some of the fish, then you can keep more fish on the third day. The rule is set up to stop people from keeping 200 salmon when they go on a 50 day fishing trip across BC.
Regarding what rig to use, make sure you check the regulations on how many hooks you can use on the line. Two is usually the most.