I'd really advise telling your parents to cancel OP.
My Mum died a few years ago. Beforehand I thought I'd deal with it Ok, standard emotionless man etc etc etc.
I did not deal with it OK. I was not myself for a good month. I felt angry, I felt sad, I felt happy, I felt relief, I felt all kinds of weird inappropriate emotions that I was ill equipped to deal with. I managed to hold it together for the most part in public, and in front of DD, but DP saw sides of me she didn't know existed. I've always been a calm stable presence in other people's lives, a rock that stands firm and holds everything together. I didn't realise how much being that rock mattered to me until I couldn't be that person any more.
I can't imagine how I'd have felt if there had been other people in my space during that time. Home was the one place I could stop pretending for a bit, stop hiding this new, untethered version of me. I needed that space, without other people's eyes on me, well meaning as they might be.
At the very least, put your parents up in a hotel, go out to see them out of the house. If your husband wants to come with you, great! And if he's happy for them to pop to yours for a few hours, then also great. But let him have his home be a sanctuary for a while, even if he's telling you right now it'll be OK.