Traveling with a 5 month old

I’m going to my MIL and my child is super active now all she wants to do is be on her jumparoo or rolling on the mat my MIL has no baby stuff I’m not quite sure what to take besides stroller and car seat I’ll be flying there along with my husband and flying back alone with my daughter

She has 3 dogs so I don’t really want her rolling around in her floor

What else would/should I take ??