Prayer request: Hadley's casting dates

If you read my last post about Hadley's follow up apt, you might have read that the Hospital will be closed November and December. Therefore they want to cast all children at the end of October so they make it till Jan when the Hospital will reopen.
The scheduler called me and said they have Hadley scheduled for a casting done September 16th because that is when she is due for a new cast... that means she will be in her current cast for 2 1/2 months... which is normal. Then she said, they also have her down for a new cast October 21st because of the hospital closing. That would mean she would only be in her next cast for 1 month! I asked her if she thinks we could make it till October and skip the September casting date. She said, we can try, but she's not sure if we'd make it because at Hadley's age they usually grow out of their casts in 2 1/2 months and that would be 3 1/2 months. I asked what happens if we don't take the September apt and try to make it, but she cant make it. She said they would have to try to squeeze her in somewhere.
We are praying about what we should do. Whether to try to make it till Oct 21st or just do both of the castings.

Reasons for not wanting to do both of the castings are:
1. It's a hard process for Hadley and us. We don't want Hadley to have to go through it so much! And to have to go through it so close together would be rough. (but manageable if we have to)
2. The longer the cast is on, the better the correction is usually. Dr Mehta(casting inventor) recommends having the cast on for at least 12 weeks and to have the cast off as least as possible. Well, if we did both of the castings, that would only be a month in between them and more time out of the cast.

Obviously, reasons for doing both of the castings are:
1. She could outgrow her current cast by September and not make it till October. Our Dr will be out in the beginning of October, so if we try and make it but realize she is having problems before Oct 21st because her cast is too tight, then we wouldn't know what to do. We would either have to have the cast off for a longer period(which i don't think will be an option) or go to Salt Lake City(the next closest Early Treatment Program).

We are praying about it right now and trusting God. He is the only one who knows the future and knows what will happen in both situations. Please pray with us! It's a big decision.
The scheduler wants to know by the end of the wk, but I'm going to tell her we want to talk to Hadley's nurse and she doesn't get back from vacation till Monday. So, hopefully we can hold off till then.