In my experience If you nuke it for 10 seconds and stuff it behind your nut sack it will stay 94-96 for a couple hours. I would wear 2 pair of tight shorts to keep it in place.
You will normally be asked to remove any jacket and empty your pockets. SO you could have it in a pocket with a heat pad till you get notified and then move it to yuor crotch. If you do that you'll need more heating pads if it takes a while. The Dollar Store in my area has cheap pads that can heat the sample in about 10 minutes. Remember these pads can only be used once,the quickfix can be reheated many times.QF is usually good for atleast 18 months.

You could be a good candidate for getting clean in the allotted time. You would need to buy some test strips to test yourself.