We have a static down there, and do pretty much what you intend to do (in fact we are going down tomorrow
). We go down in the school hols and any weekends we can manage. We have even planned our house move to make it easier for us to get there.
I've been going to Brean since I was 6/7 and I'm now 42 with a family of my own. I've seen it grow and still love it. Yes it's chavtastic, yes it's Birmingham-On-Sea, yes it's tacky and loud. But it's friendly, fun, busy, beautiful in places (the beach, the dunes, the fort, the downs, the nature reserve) and it's easy travelling to lots of places.
It's very child friendly. Most of the pubs/clubs have kids entertainment every night. We have at least one day at the fair, then go out every other night.
If you went for HRU then you have RJs club as well, but otherwise there are 20 or so pubs/clubs that you can drink and eat in. Lots of the site have their own bar/restaurant but anyone can use them. We like the Seagull the best, Dickies and the Tavern if we've been to the fair and Sunny Days if we want a quiet drink overlooking the sea whilst DD is playing in the park.
The supermarket is in Burnham on Sea but there is a mini market in Brean. Nearest petrol is on the way to Burnham, plus take-always etc. A short car drive gets you to Animal Farm, The Fort, Puxton Park. There is horse riding on the beach and a stables on HRU. Further away is Cheddar, Wookey Hole, Clarks Village, Bristol, Glastonbury etc.
I'm waffling now
. Is there anything specific you want to know?