Weddingbee boards

So our wedding date is 7 weeks away, and I'm in between my two showers right now. We've been fortunate enough to receive some gifts to the house from people who couldn't make their respective shower. We have a lot of long distance people, so when I was asked for lists of people for the showers, I purposely did not invite anyone that would have any real distance to travel because I didn't want anyone to feel obligated to send a gift.. I feel guilty enough as it is! Anyway, we received a gift yesterday from someone who lives more than 10 hours away and was therefore not invited to either shower. However, it's probably more of a shower gift (not to be assuming), but it is about ~$30, and it's from one of my dad's friends and they tend to give much larger presents and generally in the form of cash (lucky us!). It came straight from the store, so no card and I couldn't only tell who it was from because of the packing slip. Anyway, we know these people are coming to the wedding, so is this an early wedding present? Or shower, even though she wasn't invited? Or what?! I just don't know how to word the thank you note, do I thank her (or both of them), not mention anything about any "events", and just say we're looking forward to seeing them at the wedding? I don't know.. help me, so I don't make an @$$ of myself!! Thanks in advance!