Riviera Delphin was a fantastic find, and a great value. Don't waste your money on a resort, especially if you need two or three rooms for family and/or guests - get the house with your own kitchen, pool and all of the other amenities.
We rented a boat for the week also (a 24-foot outboard), and having that at your own private dock was a great experience. We loaded up mid-morning, and got right on to the river, as this house is only one canal in. That gets you transiting quicker, and on your way to beach time at Sanibel or Captiva. Other homes are way into the canal system, and you'll spend lots of time just getting to the river. It's also just around the bend from the Boat House Bar & Grill, where you can pull up for a meal, and gas for the boat.
Check-in was a breeze, and Renee was always there if needed, with an instant response. Book this place ~ it's a gem!