Hello vicky, bit of a dodgy one that you will be very lucky if you can get a hotel room that will take four beds never mind five, your Dads best bet would be an appartment but even then he would have to get one for six.
The only other way to do it would be for you to go as well and have two rooms in a hotel with three in each, this way you could pay for two Adults and get one child free per room.
Lagos is a nice resort with nice beaches/ a old town and some super restaurants and is not a mad house like some of the other resorts.
Dave

Thanks Dave
I thought as much....unfortuantley i cant go as im off to Turkey with my husband and my 2 children!!!!!
I told him he would probably have to have an apartment i will tell him about Lagos thou thanks.
Vicky