We're going to Turkey this year. Previously have been with the kids (9 and 5) to Lanzarote, Tenerife, Majorca and Ibiza. All good family destinations and similar in price. We tend to go All Inclusive as it generally works out cheaper when you factor in the cost of food, drink and ice creams.
End of August will be very expensive, as you'll have missed the free child prices. I tend to book flights and hotel independently as it woeks out cheaper than a package. This year it was over £1k cheaper than if I'd booked as a package with Thomas Cook even with a free child price.
I always have a read of reviews on Trip Advisor before booking and have found the hotels to be pretty much as reviewed. Obviously if everyone says it's dirty and the food is vile, then it probably is and I wouldn't risk it however nice the pictures look. If there's only a few negative reports and the rest are good, it generally means the moaners would find something to complain about wherever they went.
FWIW, if you do go down this route, steer clear of booking via TravelRepublic - prices are good, but if you have a problem (like they sold you a room they didn't actually have to sell, as happened to us) they don't want to know and just hide behind the "Not our problem, it was our suppliers and we've passed your message on to them" and then surprise, surprise, the suppliers don't reply etc etc. Still getting the run-around from their "customer services" dept (fobbing off complaints dept) 9 months after first complaining. Now going legal