What type of boat do you have?
Bethany Boat ramp is nothing but a sand bar going into the lake. It is also shallow and full of stumps in this area. Not recommened if you do not know the lake.
If you have decent boat I would recommend whitley creek and or Bo woods boat ramps. These are close to the Bethany Ramp. YOu can stay in Sullivan, Mattoon and or Shelbyville there is many hotels to stay at do an internet search.
At the Whitley Creek and or Bo woods ramp you will have to a pay 3.00 dollar launch fee per day.
Also please consider wolf creek or eagle creek boat ramps also. The water may be clearer from these ramps.
Do a google maps search this should lead you to any boat ramp from 57. They made a new off ramp I think it is called county road 1000n that you can get off of from 57. Just stay on that road you will hit 121. You will see coles station. (Grain bins and such) Just go straight over the tracks. You should be on Bruce Findlay Road. This will take you to 32. Howys lakeside gas station will be on your right. Then you can cross 32 and go to the turn off for whitley creek or turn right on 32 and this will take you to the turn off for bo woods.