We have stayed at the Coyaba 3 times - last went to Grenada in 2003.
I have no idea if it survived the hurricane, but Le Chateau is 3 minutes walk from the Coyaba and we ate there loads of times, the food is excellent and very reasonable - you get locals there as well as tourists, always a good sign. The two guys who set it up used to be the expertise behind the Nutmeg in St George's, we were told by locals that is went downhill after the they left.
If the Aquarium is till open then it's location is unbeatable, you look across the bay to St George's, go an hour before sunset for a swim on the beach, then eat: we went there the evening Grenada beat Jamaica 2-0, you could hear the crowd road right across the bay: best to go if you hire a car for a couple of days (recommended) as a taxi adds to the expense of a meal. To get there you have to drive through the airport (I am not kidding !)
The Nutmeg is (was ?) on the carenage in St George's, has a great view of the harbour, nice for lunch, they do good ice cream but stick to basics on the menu.
Avoid eating what I think is called Oil Down, it's the local speciality but is not to British tastes, but conch (especially as a starter) is yumtumptious, as is Callaloo soup.
Don't go full board at the Coyaba, the hotel is in a fantastic position, and the breakfast is more than adequate, but the only time we ate there in the evening we were terribly disappointed: everyone we spoke to on full board moaned about the evening meals: a shame, as the staff are fantastic. Tea and cakes (complementary) is served around 4 o'clock if you happen to be in the hotel. The pool is great, the garden has table tennis table (did you know it's called pinka ponka in Italian ?) and there is (was ?) a tennis court. If Ecodive are still running a diving school in the grounds they will take you out snorkelling if they have space on the boat: if the kids can swim then it's a wonderful afterrnoon, you just jump off the boat and spend an hour floating over a coral reef for an hour while the scuba divers swim around 30 feet below you, if the children can't swim they can use armands, I guess. The guys who work there eat at Le Chateau regularly, just ask them for directions.
The hotel has a large (and beautiful) garden which fronts onto the beach for about 80 yards: there is a fence between the grounds of the hotel and the beach, when we were there people tended to drag the sunbeds on to the beach and relax under a large tree just outside the gate (the tree might not be there after the hurricane). If you don't want to be bothered by the vendors on the beach, just stay inside the gate, the security man keeps the vendors out. We didn't find the vendors a drag, they quickly moved on if you said no thanks: there used to be a guy who sold coconuts: absolutely p*ssed, he sliced he top off with a vicious machete, topped it up with rum and handed it over. One day he sold the last one to my wife: when I said I wanted one, he said no worries: 5 minutes later I saw him at the top of a coconut palm, dead drunk, cutting off more coconuts !!
The beach is very quiet on weekdays, it fills up with locals at the weekend, one snotty English woman moaned about it until my wife acidly pointed out that as far as she was aware we were on the island of Grenada, and it is their beach: personally I liked the contrast, and unlike the UK there were families there, and no groups of rowy teenagers.
The walk along Grand Anse beach at dusk is very romantic, there used to be a ramshackle wooden restaurant at the far end called the Coconut Beach, I hope it survived the hurricane, which did excellent seafood: you eat at tables set in the sand with hurricane lamps, the children will love it. When I rang to check for a table the conversation went like this:
'Is that the Coconut Beach ?'
(Long pause) 'Yeah'
'Are you open this evening ?'
(Long pause) 'Probably'
'Do we need to book a table ?'
(Long pause) 'What time you wanna come ?'
'About 8 o'clock'
'Just turn up, man, we fit you in'.
Be warned, if you go for a walk along the beach at dusk, you may find the gate locked, just use the public footpaths to get back to the front of the hotel.
The Grenadians are very friendly people, and they love children: we never felt threatened at any time: they are very religious, church attendance is far highter than the UK, and the only swearing I have ever heard there was by Bits, the locals don't do it. Guard your purse/ wallet in the market in St George's, but I would say that about a street market anywhere on earth.
Go and enjoy, we are planning to return next year.