Hello Jody, glad to hear you are doing well just busy and we have missed you on the forum. That is so sweet that Maui wants to be with the kids when they are being read to, he doesn't want to miss out on any action, and if you could capture that on video to share with us that would be super.
About your question, yes I agree that the adventure pack is a little small for a longer period of time for a grey, I use mine for my sun conure. I have a bigger travel cage that I use for Josey and I have included a link so you can check it out. It collapses down for easy storage and comes with 2 bowls and holders plus a perch, I love mine and I have no problem with Josey going into it as she knows she is going somewhere.
http://www.thecountryroost.com/catalog/product_info.php?cPath=28_29&products_id=98