Tony, the beach as a whole is your best bet. If you can tag along with a local you could fish low water up BUT don't go out to low on your own as the gullies will fill behind you without you noticing. If you can't find a local willing to take you out then you can always fish the beach from about 3 hours before high tide and a couple of hourd after. Recommended spots are towards Fleetwood, behind Rossall Hospital or up to the coastgaurd station. It's all clean ground so no problems with rocky bits. Local lug is good if you're unable to get any crab to take with you, I don't think you will buy crab locally.
If you don't want to travel from Blackpool the fishing from the lower prom behind the Metropole Hotel (right beside North pier) can be OK but I think you may find the tides a bit small this weekend.
A good bait shop is Bispham Angling on Red Bank Road at its junction with the promenade, just google bispham angling and there is a map.
Good luck if you get to have a go !!!