I am not sure if the Big Island has this- I am sure there is bound to be one or the operator, but when I spent three weeks in Kauai, there was an kayak operator for sea kayaking.
I did not see a lot of them - any case he had a great operation which I liked is the fact that he had a crew that already had the kayaks in place to our launch site, we would first meet at the main office location to do a head count, safety information, disclosure of emergency, etc, then we would board a van and that would take out to a main beach,...then the crew would meet us at the launching point, they would quickly explain the way to maneuver and sail the kayak if you had no prior knowledge... if you came as a pair they would pair you with a two seater versus one seater... the kayaks were already at the beach ready to launch, the crew of I think 2, one who drove the truck and another one to help take them get off the towe dolley they had. In essence, he had it to a science in terms of timing. Not sure how many he did in a day..I should have asked. The one I did started at 6:00 a.m.
However, what I liked as well is that he used the local restaurants to supply his meals for our trips (so you got real hawaiian chefs to do this and in essence he also advertised to us of a restaurant....."Oh yeah that crab salad you can get a XXXX Restaurant, or that wrap comes from XXXX Restaurant,), how he got all those meals, fresh hawaiian coffee, fresh fruit in one of the kayaks, I was amazed and of course water proof and got forbid if this aid capsized...lol.
Then in the middle of the sea kayaking trip we would stop at a secluded beach to rest, his aid would then prepare the meals, fresh coffee, etc, fruit all of course water proof...I thought it was amazing they were able to pack all that in one of the kayaks. I also thought, it would be neat to combine it for the adventurer traveler..in essence maybe start early in the morning 6:00 a.m., do a mountain bike run then head to the beach at embarkation point and do the kayaking trip beach. This would be good for some of the cruise ships heading there, and the adventurer traveler wanted to experience the Big Island in a different manner.
Anyway, this was an amazing excursion that I will remember because the guide was very knowledgeable not only I was able to see some incredible beauty of the island that you can see through the ocean, but also experience dolphins around us, some whales, and some green turtles as we were kayaking.