Questions about Signature Board

We want to have our signature board at the rehearsal dinner and only have our families sign it.

Now I just found out from Duet that they usually take it to the reception hall in a frame they lend you and then take it out of the frame at the end of the night.

1 - We have 32 people at the Reahearsal dinner do you think having a signature board for that amount of people isn't worth it?

2 - Curently we have 185 people going to the wedding. Is it better to have the signature board at the reception?

3 - We have a guest book, that my dad was adamant about getting, will the signature board interfere with the guest book?

Please help!!

TIA

If you want only your families to sign it, I would just bring it to the rehearsal dinner.

Most ppl do one or the other, board or guestbook. If you have both most ppl probably won't sign both, I would think, or get confused on what it is.