I don't know the area well, but Pak Chong is nice country. Theres a pretty good steakhouse- the ChokChai farm and steakhouse in Muak Lek, on the way to Saratburi. Given the dearth of farang oriented stuff around there, you'll no doubt make it there at some stage. Apart from that, theres obviously Korat.
Similarly, Wang Nam kiao I've just driven through. nice place, but not much farang around- Korat will be your main port of call, as it's even a bit of a hike to get to Muak Lek from there. Both places are in hilly country, fringing Khao Yai national park-I doubt flooding would be an issue unless there are low lying parts I didn't see.
