Easiest way to deal with formula feeding on short trip away?

[trrk]

We are taking our 4 month DD to visit family for 3 days but will need to stay in a hotel or AirBnB. What is the easiest way to deal with formula while travelling? At home we sterilise Mam bottles in the microwave (using the self-sterilisation function) and use the Perfect Prep and just use readymade formula when out and about (we usually go for the easiest option).

Should we just take readymade for the whole trip or use the hot and cold water method to mimic the perfect prep? How about sterilising and washing bottles if there is no microwave or kitchen? Bring sone disposable bottles or buy a portable steriliser?

Am still debating staying in a hotel where we can get a cot but no microwave and kitchen to wash bottles or an AirBnB where we would need to buy a travel cot. Unfortunately DD is already too big to sleep comfortably in the pram bassinet.

This is our first trip away so any tips to make it as stress free as possible for us first time parents would be appreciated!

You could always take the Perfect Prep? You only need a plug socket for that!
Otherwise the hot and cold method would be a good idea. We use it all the time if we take DD out for the day.
Have you looked up cold water sterilising? I’ve never done it myself (our steriliser travels with us!) but it might be useful for you.

I've just used Milton cold water sterilisation when away in a place I didn't have microwave access.
Just used a large Tupperware container I could fit the bottles in fully submerged.
And I took the pre made cartons of milk.