I did the same thing as you--a reception at disney and one at home. I also had a large disney invitation list (dh's family is huge and I wanted to invite my cousins (i'm close with) so I couldn't really tell mil that he couldn't). So, just a tip, but I sent out the invites to all the disney invited guests with a note card stating that if they were unable to attend in Disney there would be a local reception (hint, hint, not invited to both) and a response card that stated:
M-------
___ will attend the Disney reception
___ will attend the local reception
___ cannot attend either reception
Now--I was having a buffet, so I could do this cleanly without having to worry about the beef v chicken response card.
Just an idea. Also, I found the Sassydesignco to have beautifully tactful invitations. However, I found them when I was looking for round two of my invites (the ones that were ONLY invited to the local reception) and my dh thought it would be tacky to send disneyish invitations to people who were not invited to disney.
Good luck!