Holiday Park for teenagers

[No1HolidayPlanner]

Hi.. looking for recommendations for a holiday park good for boys 14 and 12. Indoor pool a must. Nearish to a beach. Preferably not too big a site. Taking our dog as well.
Hoping you will recommend a hidden gem!
Anywhere in U.K.
Thanks

Try Unison Croyde Bay in North Devon.

It's not small, but in terms of activities for two teenage boys, I can't think of anywhere better than Warmwell Holiday Park in Dorset. Dry ski slope.... need I say more?!