If your husband will be away, there are grounds to postpone immersion. However, if you and your husband would, understandably, prefer that you immerse the night before his return, then you should make every effort to do so.

It is halachically permissible to bring your small children to the mikveh, especially if you have prior consent from the shomeret. However, there are practical concerns: that they might disturb other women or distract you from preparations. Leaving sleeping children alone in a parked car is also not a safe option. We think the best alternative might be to ask the shomeret and your neighbors if they know of any reputable babysitters. Given that your friends will be at a wedding, you might be able to ask to leave your kids with a friend's babysitter while you go to immerse.

If you do take the children with you, arrange with the shomeret to come early to be first or to come late and be last, so as to disturb the fewest possible women. Perform as much of your preparation as possible at home (preferably when there is child care or a neighbor available) to minimize your time at the mikveh.