Hello seesibet, there is a resavoir near Ban Phu on the road to nong kai you can get to it by the 2021 road off of the main highway to nong kai, it does,nt show on the maps,but its there and the fishing is great but seasonal, had some great fish from this place the place is massive,there are 3 routes to the place one of them go's right past my front door unfortunatly(exccesive disturbance) so i won't give directions to that way sorry

, it's approx 15mins off high-way,get to the area and some-one will point you in right direction.But don,t tell everyone.
never seen another farang there or many other anglers,so it,s ideal. If i was in the area you could join me for fishing and beer no problem.
Tackle is available to buy in udon as already mentioned at reasonable cost maybe for hire to. Or buy cheap and sell back to shop better still give it to some-one who would use it all the time,a lot of thais like a bit of fishing not for the sport but to eat the catch and some could may-be not afford to buy the gear.
The second place i know is on the way to nong bua lumphu,again another resavour more fisherman,and is on the map easier to get to on the 210 road then turn off on the 2314 you may have to pay a small fee for this one. only 20mins from udon. been there but not fished it.
Hope thats some help to you. BM