You should ask this on the ThaiVisa forum (forum dot thaivisa dot com), possibly in the "Thai Language" sub-forum.

The timing of your trip, if I recall correctly, is advantageous re: college students, as they some may be on Summer holiday then. The bigger problems will be logistics, travel, housing, etc. Are you going to be in one location? How many hours service will you require? Are there technical/arcane terms you'll be asking about? What is your budget? Further complicating your situation will be the use of Lao in Issan.