Why were you diagnosed with LADA? Was it because you tested positive for the antibodies? An A1c of 4.9% is firmly in the non-diabetic range, so I’m guessing there must have been some other test that identified your immune system attacking your pancreas?
When you say you tested at 120, do you mean your fasting blood sugar? I wouldn’t really be alarmed by 140 after a meal. It’s just in the upper range of normal for breakfast. I posted this chart the other day showing blood sugar levels of non-diabetics: Affects of diabetes - #4 by katers87.
It doesn’t sound like you should be worried about emergencies. It might be best to ask: what’s the worst that could happen? If you end up running a little high on your trip, then you can fix that when you get back. If you end up losing all beta cells on your trip (seems unlikely since you’ve had this for 2 years), then you can call your doctor or visit a clinic there. They should be able to write a script for some insulin. I’d just test regularly to make sure everything is working right.