Should I withdraw my retirement to help pay for relocation costs for my PhD program?

I am 28, single, and applying for PhD programs in Public Health. I will most likely get full funding for the PhD. However, I am worried about moving expenses , etc. I have been working for two years and have a 401(b) retirement plan. When I quit my job to start my PhD should I withdraw the money in order to help pay for my moving expenses? I understand that there will probably be about a 30% penalty. Any ideas?