Huai Kha Khaeng HQ Campground Temporarily Closed

I don't know - but I would think its surely open again as the weathers changed significantly.

Great pics! Interesting that the camp ground is not open again. I have not been there for so long I had forgotten how good it was!

Love the crossing piglets!
My guess for the white raptor is a Changeable Hawk-eagle, but maybe one of the true bird experts on here can give yo a definite answer.
I have seen this light colored variation a couple of times in HKK.

A shame the campground is closed. Does that mean you stayed in the rooms 2kms before the entrance?
The vegetation looks green and there seem to be quite a bit of water in your pics so one would think that the camp could reopen. Or maybe the water pump is not working?
Maybe they want to spare the water before the wet season really takes off, just to lower the impact on the nature.

Ah OK.
I usually stay at this one, when I arrive too late to enter the park:
goo.gl/maps/3nCakktdPYy
A couple of years back, I have been to the place you stayed, just to check the rooms, but prefered the one in the link, above.
He (park staff of HKK) doesn't serve any drinks or food, but within 100m walk there is a place that sells food and drinks.

Important note: camping is no longer possible in the HQ area of Huai Kha Khaeng. And the little restaurant is closed too.

It has been a long time since I last visited HKK, but after my visit this week (December 2016) I can hereby confirm that the camp ground in Huai Kha Khaeng HQ/ visitor centre area is still not open. And I do not expect it to open anytime soon.
There seems to be more to the story than the drought which was the initial reason given, at least on this forum.

Apparently there has been an incident in April 2016 with an elephant that decided it was time for the annual tent-inspection.
The owner of the tent survived, but with broken ribs.
For this reason the camp is no longer open.
A shame.
Always those bloody elephants! No manners! ;-)

Also the little restaurant near the HQ is no more. The lady who used to run the place is now operating at the little pink resort (owned by her husband) 2kms from the gate.

So not only for overnight, but also for lunch you need to leave the park unless you bring your own food (make sure to keep it locked in the car, otherwise the Long-tailed Macaques will walk away with it.)

So far the current status.