The tides aren't particularly favourable that week. If you go through around low tide or slack water it will be dark. Same in the morning. As Neil suggests - if you must do it, try splitting the trip. You could even moor at Berney Arms so as to leave crossing Breydon as late as possible.
Having said that 8 feet isn't a huge amount, so as long as you avoid high tide you may be OK but is just depends on water levels on the day. Looks to be spring tides so the rise and fall will be greatest.
Not easy, if it were me, I would leave it as late as possible going through Yarmouth to allow enough time to moor up for the evening.
Good luck!