I'm having my place sprayed for bed bugs (yes, it sucks), and they recommend having the cats out of the apartment for 4 hours. I also have a vet appointment for them tomorrow and was considering trying to schedule the exterminator on the same day to avoid extra trips. Would 4-6 hours in their carriers be too long? I'm thinking about just taking them to hang out by the lake with me while the bug people are here. Thanks for any helpful tips! You all are great!