ahh Travel... I travel so much I am almost never home. The biggest problem is that when I get home and get settled into my "routine" I leave again a few weeks later. But just so you can adjust for it you need to assume you will have to provide all you own food at all times. Bring snack bars (protein or otherwise) or Glucose tabs. The only problem with Glucose tabs is they usually are a short term fix to a low. The protein bars and snack bars have fat and protein in them that slow the glucose changes so once they bring your sugar up they sustain it better than just sugar alone.
The other problem is Insulin. You can't check it cause it will get too hot or too cold under the airplane and carry on luggage is only good for larger planes. I travel from Houston TX to Alabama, Virginia, Mississippi, and other places not too far away that use those little airplanes. So I have to consider the carry on size of luggage for those. Not much bigger than a laptop back is allowed on the plane. I do shots and do not have a pump so my insulin paraphernalia is smaller I think but it is very much something you have to consider for long trips. ALL Insulin stays with you and a good supply of other items if you have so much you HAVE to check some of it just be sure you keep a few weeks worth of the injection site kits and other stuff in carry on luggage. Cause the airline doesn't care that they lose your bags. Even if the bags had Life sustaining medications in them.
It isn't easy and certainly not fun to get all this extra stuff through security but TSA has not been a problem yet. I have a letter from my doctor just in case and the letter has the reason for all the needles and sharp objects I carry just to be sure they don't try to take it from me. But like I said they have NEVER even asked in all the airports I go through so probably not a problem.
Then there is the wonderful hotel fridge. If you are storing insulin in them PLEASE get a thermometer. You can get good thermometers from Walmart or other stores that have a baking section. Just be sure it reads the temperature ranges for your insulin. I use a digital one that has a large LED display to show me what my fridge temp is. If it is a little fridge and has one of those little (NOT VERY USEFUL) freezers in it then it is really important to watch the temp. Those little freezers cause the entire fridge to be colder than normal. If your juice is freezing then it is probably TOO cold in the fridge. If you can afford it then stay in a Suite style room with the full size fridge/Freezer. Makes it much easier to control the temp.
As far as eating out I try to limit it to lunch only. I am usually with Customers a lot and don't have the option to say no for lunch but dinner is usually easier. I usually can find something decent on the menu that fits my eating plan during lunch though. Most of my lunches are at reasonably "chain" style places so I normally know what is on the menu anyway. Good idea to check the area out in advance (I love GOOGLE) and see if there are a few well place restaurants that have menu items your used to eating. And as it was said already BRING YOUR OWN SNACKS. No body is going to take care of you like YOU. I pack a little box of KOSHI Snack Bars with me everywhere I go.
As far as sleeping and low sugar. Uhhh I don't have a CGM and have not woken up feeling low so far but I don't have much problems with low sugar right now anyway so I guess that is a less concern for me. If you do notice lows at night just be sure to adjust your insulin accordingly and use some night time snack carbs to offset the problem. Test Test and Test again while doing something different of course. No matter if it is traveling, being sick, or any other change in your "normal" routine. it is important to test during those changes in routine.
And if you have a free texting phone it would not hurt to stay in regular contact with your spouse. I call my wife at night and Text during the day. Even if it is just "hey 10am and doing good BS at 110" I also have a cool meter that uploads immediately to the companies web site so if my wife really wants to know my sugar levels she can just log in and see my last test for that day. It has a built in Cell device so no computer needed for the uploads. Cool meter my new insurance has me using. Anyway, texting is simple and quick so try that and phone calls to each other when convenient.
And remember to find time to work out and relax. It is always good when you can take a breath and just relax. Especially after a good workout and a long day of work.