I'd wait until you get there to decide. If there are waves and/or wind, take a cab. If the seas are flat then it's just a normal dinghy ride. I carry a handheld VHF when I do dinghy trips like this, but I'm not sure if the charter boats supply one. I've done that round-the-corner tip in waves before. Also, if you plan on returning after dark, then take a cab.