personally i would be ok with him going.. in fact my DH did go towards the end of both pregnancies.
that said it will be reallyhard - but better that then when the baby is just born.

but ifyou feel strongly the other way be upfront with him. i have had trouble free pregnancies and both boys born at 39 wks. maybe some faily could come stay for a few days to help - i did ask my mum to do that.