I went with Lam to recce Phu Kradueng mountain from 4-10 October 2019. We spent 4D3N up in the mountain. It is a camping-friendly site where food, tents, sleeping equipment (mattress, blanket, pillow) are easily and readily available.
About Phu Kradueng Mountain:
(1) It is located about 500km north of Bangkok;
(2) Trailhead to the peak = 5.5km (moderate hiking pace takes about 4.5 hrs);
(3) Peak to the National Park Office/campsite (walking on flat land) = 3.5km (about 1 hr);
(4) There are five (5) food/drink stations from foothill to the peak;
(5) Difficulty level: moderately tough (similar to hiking from Kem Lolo to Kem Pacat of Gunung Nuang);
(6) Area of flat summit plateau of the mountain where major attractions are held = 60 km²
Note: the hiking photos are in Lam's camera.