Nearest tackle shop:
http://www.loughswillyanglingcentre.com/location.htm
This lad stocks a full range of Ammo baits and a decent selection of sea fishing tackle.
Should be a few mackerel available off the pier. Spinners or feathers will do fine for them. Or float fishing, if you prefer.
For bottom species such as the flatties, a 2-3 hook trace, small wire hooks, mackerel tipped with squid. Tides are strong, so a 5-6oz gripper might be an idea.
Dawn or dusk might see you in with a chance of a ray, sandeel on a pulley rig would be your best bet.
Dogs are pretty much a certainty, they're not particular about rigs, baits etc.