DP and I went for a weekend in late August this year. We absolutely loved it. We stayed in a lovely, seafront B+B and had two delicious meals out; fish and chips one night(Papa's, very, very popular so book ahead if you go) and Greek meze the next night. The beach was nice too, the sea was in often, only once when we walked by was it out, the sand sculpture festival was there and they were spectacular.
We drove over to Cheddar Gorge for a day, I had planned on going on to something else once we'd seen the caves but we were enjoying it so much we ended up staying there all day. The caves were fascinating, very well organised too, there's a special tour laid on for kids so they can get into it. The cheese factory is worth popping into too, the only cheddar made in Cheddar, can you believe it! Tasters available too, yum.
We're deffo going again and will take DD next time. We saved Wookey Hole for when she's there as it looked more geared towards kids, Jerry Cottle of Cottle's Circuses has taken over and made it very razmatazzy; groovy lighting and pirates etc, fun for the kids.
As you may be able to tell, I heartily recommend it.