They blew up the cave access in the 60s, but it's still a wonderful dive. It might be a 100 or 150 feet swim to the Madison. Royal, Peacock, and Little River are the other side of the river. Close enough where you'll get there well within your surface interval. OW is welcome at Orange Grove (Peacock System) if the vis is good, but not at the other springs in that park or over at Little River. However, Royal is a fun dive and full of baby peacock flounder. 3 to 4 inches. You have to have great buoyancy and kicking to not silt it out there. Even then, it's hard to spot those guys at times.80 FFW?! That is one spring I've not yet dived. I'll have to get up there and dive it one day. Sounds like you can easily get a fun day of 2-3 dives.