MCO reward flights - Help please!

Fingers crossed you lovely people can help.
We are looking to go to Orlando. 2 adults 2 children. Ideally UC but I appreciate this is not going to happen so maybe PE for some and UC for others. Moving them as availability happens.
We are going for two weeks so I was a bit worried that by the time the return flights are released the outgoing flights would be gone. Should we book singles or do a dummy return date and change it when the flights open up (I appreciate we would pay £120 for the change)?
Also should we be looking at indirect but busier routes? We flew via ATL last time and won't be doing that again. But maybe via Boston might be an option?
We are looking to go to Orlando. 2 adults 2 children. Ideally UC but I appreciate this is not going to happen so maybe PE for some and UC for others. Moving them as availability happens.
We are going for two weeks so I was a bit worried that by the time the return flights are released the outgoing flights would be gone. Should we book singles or do a dummy return date and change it when the flights open up (I appreciate we would pay £120 for the change)?
Also should we be looking at indirect but busier routes? We flew via ATL last time and won't be doing that again. But maybe via Boston might be an option?