We accumulated several nights in our travel trailer at Collier-Seminole in the November/December time frame, staying at a total of 5 campsites (76, 45, 84, 22, and 66).  The standout for us was the quick and helpful response of the staff.  Ex:  As we were moving into site 84, we spotted a fire ant problem, and they attended to it right away.  Ex: As we were moving into site 21, we saw that the middle board of the picnic table top was rotted out.  I brought this to the attention of a Ranger passing by, and we had a different table within 15 minutes.  Ex:  We had the misfortune of locking the keys in a friend's vehicle, which caused us to have two vehicles on site overnight.  The staff was very understanding, and even suggested an empty campsite nearby for parking our second vehicle overnight   Ex:  Because our initial bookings were late, we did a quite a bit of "jumping" between sites.  The staff proactively stopped by to tell us we could move to our next site early.

Other reviews cover the mosquito situation.  I would add that dealing with the mosquitos was routine for a grizzled Minnesotan such as myself, but the aggressive biting noseeums were something new.

Some "insider" information: 

(1) campsites 22 and 24 are the only sites with paved pads.  The rest are gravel.  ALSO, campsite 22 is actually a double wide paved pad (used to be sites 22 and 23, but they combined them into one).

(2) While you are limited to one vehicle per campsite, you can park an extra vehicle down by the boat landing.

(3) There is a lot more shade over the grounds than the view from Google Earth would suggest.

(4)  There are washers and driers that take credit card payment.  Nice.  The bath house in the A-loop has two washers and two driers for doubling up.

(5) This campground has several bag dispensers for dog clean up that are always well stocked.  GREAT for those of us on an extended stay.