Going PRN?

Trying to decide if I want to switch from my full time status to PRN between two different units. One of the units always stays busy, but the other has low census days and I know I would be the first cancelled. Also worried about the choice of shifts I will have available. Of course I worry about losing short term disability and retirement- my health insurance is with my husband's company.

Anyone else have these doubts when trying to make a decision to go PRN? Any advice?
What are your reasons for going PRN rather than full time? It's hard to give advice without knowing why you don't want to be full time. Personally, I work a very strange schedule that's similar to PRN. Some weeks I work full time, but lately we've been slow and I've been cancelled at least one day per week. Some weeks I only work one day. It's really tough sometimes when you can't depend on a paycheck each week. All units go through ups and downs in census- so there will be days you'll be cancelled from the busy unit too. But if there are some good reasons why you want to go PRN, then those reasons might win out.