Hi soleman.
If you fancy digging your own bait, try for creeper (small harbour rag) which is easy to dig at Condor Green near Glasson Dock. Arnside flatties love it!. Otherwise black and rag will do you just as well. Local lads also do well with spoons, but Ive never tried them there. My fave 3 venues at Arnside are next to railway viaduct, from the beach at the seaward end of town or from White Creek, which is about a mile "downstream" of Arnside itself. Flatty / flapper rigs work very well and tackle losses are few as most spots have you casting onto sand. 4oz should be enough. I tend to fish 1 hour up and 3 hours down the high tide. Speaking of the tide. Watch your back if you are setting up at low tide. The water sneaks up around you and you can quickly be cut off. also don't stray too far out into morecambe bay as it is notorious for the shifting areas of quicksand. If you fancy a clean and tidy alternative venue, try Greenodd across the bay. You can fish more or less from the car park and the above methods are just as productive there. One final point. If you plan on fishing a big tide, watch out for the bore. Its very powerful and you wont hold bottom for about 20 mins, but all the fish follow it in.
Hope it helps. Sowie