I live in the area, please do feel free to DM me :)
Even if your children had sat the 11+ I believe the grammar schools operate a one in, one out system as of course, they always fill their quota. You are unlikely to find a place at Ripley as it’s heavily over subscribed. QES and Dallam can be quite a challenge to get to and from from Morecambe/Lancaster as QES only has direct school buses and Dallam, while on a main bus route, has a very infrequent service. Also, QES in particular draws from a huge area which can make socialising awkward.
In Lancaster itself there is also Our Lady’s Catholic College (not over subscribed, so likely to get a place) which has a good mixes intake in terms of ability and back ground and does fine with them and Central Lancaster High which can have quite a challenging intake and does very well with them.
Outside of Lancaster you have Carnforth high (good now, but historically not so great) and Garstang academy (excellent school, bit further away, and possibly also over subscribed). Carnforth easier to get to.
In Morecambe you have the Bay Leaserahip Academy and Morecambe High, neither of which are in the happiest of places right now.
There have been changes and challenges at Dallam, but I wouldn’t rule it out. I have friends whose children go there and everyone is happy with it.