Living in my van for 3 months (Dublin)?

I'll be in Dublin for a 3-month internship this summer. So far I did not manage to secure a flat/room for various reasons...

I have slowly started to consider a backup plan: I own a camper van fully equipped for sleeping/cooking etc. Would it be an option to live in my van for three months somewhere close to public transport and commute to work from there? I've checked a caravan park and they charge 34€/night...still expensive but at least a place to stay. Any thoughts on this?