Sounds a good plan, be careful about slipping into any "last time we...." Kind of scenarios though, made that mistake in July regarding anniversary and it didn't do me any favours
Get your point re the kids, I think its good to keep their stability at this stage, my s ended up being at Mil's or out with me (remember the can't go to the flat since it would upset him ) think its much better now he has two stable places but its taken a while and w is still wobbly about "not setting a precident for multi night stays". So in your case I can understand the stable place idea.
M:44, W:46, S:10 M 13 years, T 15 BD:23/7/2014 W/S Moved to MIL: 23/7/2014 My new place: 21/11/2014 W/S back to flat 22/11/2014 W coming closer, talking 4/2015 Piecing 5/2015 Moving in again 6/2015