We have travelled with Quasar a lot. In fact, we will travel to Bluff, Utah, this coming weekend to attend a hot air balloon festival.
The cat condo to which you provided the link is almost identical to the one we travel with. It gives him a place of his own to climb and hide in. Unfortunately, it does not work in all hotel rooms, including the one in which we will be staying this weekend.
Please put the condo up in your home before you travel so your kitty can become accustomed to it and scent mark it as her own.
Toys that are faves when we travel are teaser type toys and small plastic pom poms that he can chase. I don't think he does much when we leave him in the hotel room except sleep, so we spend a lot of time burning off energy when we return to the room.
For his litter, we have a storage box with locking lid that we take with us and set up in the bathroom for his peeing pleasure. Just be careful that the lid is on tight or you will have a mess in the back of your car/truck when it spills.
We do try to take Q out to the tailgate parties, etc, when we can but it is very cold in Bluff in the wee hours of the morning, as we prepare to fly. Mornings I leave him in the room and we pick him up later to go out with us, complete with Puffer jacket for warmth.
If your hotel is pet friendly and they know you have a pet in the room, a do not disturb sign on the door is sufficient. Also, be sure the hotel is "pet" friendly not just dog friendly. We had one place that was very worried about having a cat in the room but, in the end, we convinced them. Motel 6 is always ok with cats, btw.
I like traveling with Quasar. He is great company at the end of the day. I have a high functioning form of autism and have high anxiety meeting all the strangers and acquaintances we see at balloon festivals so Q (and my dog) are my centers of normality (if that makes any sense).
Have a great trip!