Weddingbee boards

We are hosting our own rehearsal dinner, and need some help on the invitation wording.

Currently it says:

please join us to celebrate the Big Night before the BIG Day

Day, date, time and place...below

But, it's missing one important part - our names!  

Does it seem ok to say:

please join hobochic and hobodude to celebrate the big night before the big day.(?)

and...would you use first and last names?   Or just firsts?   or is it really all about how casual you want the invite to feel?

I would totally be on board with 'pretending' that FI's parents are hosting (writing it from their perspective and using their return address), but they haven't contributed any money, and my mom (against our wishes) did.   And...because she was in the midst of changing her name (she got married last week), and moving...her name isn't anywhere on our invitations (on the invite, or return address).   So it seems TERRIBLY innapropriate to include FI's parents name on a rehearsal dinner invite, when we didn't include my mom on the wedding invite.

help?