They do have a fence around the pitch at Maynooth town's ground. It's the Uni pitch that has no fence. Maynooth University Town is a merger of the university team and the Maynooth town senior team.
I guess they'd need to just erect some kind of a stand at either pitch in order to get into LOI.
In terms of their training facilities they'd put most LOI clubs to shame tho. They've even used Carton house pitches in the past for scholarship trials and training etc. That's where Real Madrid among others have based themselves before so Maynooth is very well stocked with plenty of top class training facilities and gyms etc. If they can just get a stand sorted...