dont want to appear rude, but do you think your wife is up to it after all its only 2 weeks since the birth ? especially if you dont have a car what with bottles [if applicable] and nappies and a carry cot etc etc.
Maybe a lot of tlc at home with her feet up and no cooking or cleaning or getting up in the night for 2 days, would be far better deal and go away at Whitsun when you have established a routine for baby etc.
But if you do go, I hope you have a nice time.