I went on a small babymoon in my 5th month and it was so relaxing! Just make sure you take regular breaks to stretch and carry your medical files with you.
Travel is mostly fine in the second trimester, but avoid bumpy roads and heavy luggage. I had a C-section later on, but during my 5th month, I travelled by train very comfortably after consulting my doctor.
Listen, 5th month is usually the safest time to travel, but don't just pack your bags blindly. Get a green signal and a travel certificate from your gynac first.
I hope to travel during my future pregnancy too, it sounds so nice. But please make sure you travel very safely and ask your doctor before planning anything.
Most pregnancy trackers mark the 5th month as the golden period for travel. Just make sure you choose a comfortable mode of transport, keep walking a bit to avoid blood clots, and keep your doc in the loop.