Actually unless you want TROPHY bluegill or bass you will have a lot more flexibility without the bluegill, northern or hybrid. The bluegill are prolific spawners and are needed mainly to keep up with the prolific bass appetite and reproduction rates.

So if you did a less fecund 'panfish' say pumpkinseed, RES, or LES you then have more flexibility with your predator. you could use pike, pickerel, SMB, walleye and achieve a different balance.

YP would be a great option and they can go in with the forage if you have enough. This will give them time to grow to say 6" plus where they usually can escape predation by the apex predator (unless that is CC)

A few CC won't be a problem in 4 acres but beware of making it to easy for them to populate.

Those with northern ponds and CC can chime in.

Remind me is tilapia off limits? I recall other IA posters saying it was.