Cluster and gauge behavior

My 2005 Grand Caravan has been giving me problems for over a year now. It started out as erratic gauge behavior in that they would all just suddenly move to the right and then come back to normal. Most recenlty it has begun to die on me as I am driving down the road (preceded by the whole light show of dash flickering and gauge chaos prior to the dying) however it starts back up immediately. It also had begun to leave me stranded at some times with me going to start it and not so much as a lone flicker greeting me. Just dead silence and darkeness. I have had it in to the dealer over six times with the most recent time ending in them replacing the dash cluster circuit board (whatever that is) which has not fixed the problem. This resulted only after I was able to catch the van in a moment of distress and be fortunate enough to be close enough to the shop to drive it in and let them see the problem (as if my descriptions were not enough). Does anyone have a solution to this problem? It is about to get the best of my nerves as I wonder each time I put my 2 & 4 year olds in their carseats if the heap of junk I am driving is going to get them killed.