We had bedbugs the year before covid. I have four recommendations for anyone prepping:
1) learn how to recognise bedbugs. You can't tell anything from the bites, they just look like bog standard itchy insect bites. Some people have massive reactions, others don't react at all. Three bites in a row happens sometimes but mostly not. Look for black dots on your bedsheets and visible bugs on the underside of your mattress (seams and tufts) and in the nooks and crannies of your bedframe, headboard, bedside furniture etc.
2) learn as much as you can about bedbug behaviour. If you get an infestation it's better to ninj up on them and quietly kill them where they sleep than to blast them with shock and awe. Chemical pesticides, and especially bug bombs, will just piss them off and cause them to scatter. Tearing your bed or bedroom apart will have the same effect.
3) Get some CimeXa if you can. It seems to be rapidly selling out and increasing in price everywhere. It's a silica gel powder - the same as in those 'do not eat' sachets but much finer grained. Watch a few YT videos on how to apply it. You only need a very light dusting and if they walk through it it sticks to them and sucks the moisture out of their bodies, killing them in 24-48 hours. They also take it back to their nests aka harbourages, where it rubs off onto the others so they die too. It's a minor lung irritant so wear a mask while applying but once it's down it is child and pet safe and it will remain active indefinitely. This means you can pre-treat your beds and prevent an infestation.
4) Look after your mental health. The main health risk of bedbugs is mental distress - anxiety, insomnia, isolation, depression and for some people OCD, paranoia, psychosis. I have dealt with infestations of fleas, headlice and rats. None of those compared with the impact on my mental health from bedbugs. I'm still trying to work out why they should be so much more distressing but they are and this is a widely acknowledged phenomenon.
Aside from CimeXa, I found the following helpful:
Dissolvable laundry bags - the bugs are attracted to dirty laundry. When we had an infestation we put all our dirty laundry straight into these bags. You put the whole bag into the machine and a seam dissolves in contact with water, letting out the clothes during the wash. I still use these if I'm staying away anywhere. Don't overfill them, allow room to give the bag a good spin and knot the top.
Pallet wrap - giant cling film. If you get an infestation you will need to seal anything within a few feet of the bed. Two layers of pallet wrap does the trick. You can then take your time decontaminating one bundle at a time. For anything that's impossible to decontaminate but you really want to save, you can keep it wrapped for 18 months. We did this with DD's voluminous sewing kit which she had kept under her bed. It was like an extra christmas when it all got unwrapped and returned to her.
Clear, heavy duty rubbish sacks - if you have a lot of stuff you need to seal then heavy duty rubbish sacks are useful. Again, don't over-fill them, allow enough room to spin the bag around and tie a proper knot in the neck. Clear bags are useful so you can see what's in each and it's far less mentally oppressive than being surrounded by black bags for weeks or months.