Travel and half-life dosing?

I fly out in a week for a cruise and I do not plan on bringing a pen or vile with me. I currently have compounded plus a few of my namebrand pens left. My dosage is normally 12.5. I was going to dose today and then again on Friday and then not again for like eight or nine days. So, my question is, should I do 12.5 now and then do another 10 on Friday or how do you typically split the dosing? My last shot was 12.5 nine days ago and I want to eat everything in sight.

I have a compound vile with 12.5 dosing on the instructions. And, I have a 5 mg, a 7.5 mg, a 10 mg and a 12.5 mg pen left. I won’t waste any of it because I’ve had to pay cash. But, I need to know how to get thru the next two weeks with a dose today and one on Friday. Then, no dosing for 8 or 9 days. Not ideal I know, but I just don’t want to have to deal with taking refrigerated medicine through the airport and on a cruise ship. Thanks!!