LAX is usually cheapest to fly into, though Burbank / Bob Hope and LAX airport are about the same distance from the resort. There are no commercial flights into the Ventura area. Santa Barbara is 45 minutes away.
A van shuttle runs from LAX to the hotels in the area. This shuttle runs about every two hours and takes about 20 minutes to make its way around LAX, picking up passengers at the blue transportation signs, right outside baggage claims.
Once you are at the resort, there is plenty to do there, and by walking a 1/4 mile to Channel Islands Harbor, which has several restaurants on the water (as well as places to rent paddle boards and take boat rides). Ventura is a 15-minute drive, and there are a number of places to rent a car in the area.