6 nights thru PP ... $331. I believe, not positive, but I believe your kids don't need fishing licenses if you're with them as they are basically included under your fishing license and count towards your daily/posession limit.

Does an RABC include whole families?

I don't ever remember fees being $5 a night. Maybe $6.50 off season in the early 80's and I've always wondered if BW trips were taxpayer subsidized. What would that same six night stay cost the three of you there? ~$32?