A bit short notice there , Einocent.Sorry I missed it last week but a one day lead time for a route question is a bit tight.
Anyway you also forgot to specify which direction you planned on doing it, it makes a slight difference as to where you need to spend the night because to do it in one day is a waste of scenery.
No doubt by now you have already done it and discovered that it is called highway Mex 307 and it is a very good paved route,Pemex in Benemerito, barrel gas in several other places like Frontera Corozal(on the riverbank 16km east off Mex 307) ,hotels in both these places and several other smaller hamlets-if you look.
Hope you knew that you could have taken a boat tour from Fr.Corozal to Yaxchilan ruins, and/ or the tour of the ruins of Bonampak a bit farther north and then west from their welcome center-- by bus only.
All pretty jungle type country but lots of it has been knocked down to make farms and African oil palm plantations. Some nice mountainriding in the southern E toW section and some spectacular vista points to the mountains of Guatemala.
Let us know how it went, and next time get the questions off with longer lead time, none of this JIT stuff ,please