Damselfish has it exactly right. There is almost no place on the north shore I don't regularly visit via a shore dive, but it took me a long time to learn how to do it. And I have a truck at my home on LC to carry me and my gear to the entry points. It definitely can be done, but the logistics are difficult for a short-term visitor. If you are staying at one of the resorts (including LCBR), you can arrange for them to take you over to the Cumber's Caves/Jackson Wall entry point and then pick you up later, but that's probably the only shore entry point they would be willing to show you. And that's as it should be! You really need a guide to show you how to pick your way through the fringing reef at the other entry points before you try it on your own.Damselfish:I'd book the afternoon boats if you want to dive afternoons. There is no shore diving right at LCBR, it (along with SCC and Conch Club) are in a shallow grassy lagoon. A few people on here have talked about doing lots of shore diving on LC but I think it's a little easier when you're local. First you will need to make sure LCBR is letting you take tanks off site for shore diving - their packages may say something about unlimited tanks for shore diving but in reality pretty much no one staying there ever does it so I'd verify that. Then you need to get to other places to shore dive - unless you're going to carry your dive gear on one of the bikes this probably means a car rental, which are expensive on LC.
Bruce