Theres no limit on how many can enter the open Caster Troy, theres just a limit on the pier pegs, if your stuck for bait then the shops around Tyneside and North Shields/Whitley Bay area are a better bet because there away from the comp area. Bait quality should be ok as the tides are'nt too bad meaning the diggers can get too the better worm.
I'm planning on fishing the early morning high water on sunday around South Shields/Marsden/Whitburn areas, the winds are forecast to drop late saturday/early sunday so might get amongst some of those piggies thats been getting caught.