My invitations are here!

And they messed up half the cards to be inserted. Half are white and half are Ecru (we wanted ecru). But no worries I'll have new ones by monday! I put Carlson Craft through hell! adding insert cards and changing everything! haha
So now I am going through my addresses and making up a new list that someone besides myself can understand. Should be sending out the envelopes to the calligrapher monday but in my rewording of addresses.
Now my problem:
For STDS I didn't bother worrying about + guests, I figured i'd want to address those to close friends only and theyd find out soon enough if they were getting a guest at that time. Now when I have been researching addressing these suckers and it says to have the outter and inner envelopes addressed and on the inner you would put the + guest. I really don't feel like spending double than I had planned now to have these inner envelopes written out, but I also feel like it would be weird putting "mr.so-and-so and guest" right on the outside envelope.
Maybe i'm being crazy and over thinking the whole thing. It's only about 5 invitations where I'm having this issue with.
Any advice? anyone want to tell me to shut up and just put the "and guest" out there? haha I think i'm getting overwhelmed by nothing.
deep breathes!