For all that Cesare complains about Camp imposing its will on people--and it does really genuinely bother him that he can't go beyond whatever arbitrary point the barrier is at--, he feels so much freer here than he does back home. At home he is always being supervised, even if he's not always being told what to do, and there's just no getting away from it. I don't think there's a single scene in canon where he's truly alone for more than a matter of minutes. There's always a guard at the door or down the hall or generally waiting just out of sight. He knows it and he hates it. In Camp even if there are people around they're not necessarily watching him and he is hardly the most noteworthy person here. When he first arrived, someone tried to rile him up by pointing out that no one knew him and he couldn't boss anyone around, but he's willing to make that trade. Sure, he gets frustrated a lot by how much more efficiently he could get things done back in Italy, but at the end of the day it's worth it when he can go out to the stables and get on his horse and very literally get lost.

Cesare also really likes how much time Camp has given him to sort through things and try to come up with a better plan (and a better one, and a better one, and...). He spends a lot of time in the library or just thinking about home and trying to work out what he should do. Normally he would consider taking anywhere near this long a waste, but it's not like time is passing back home, so. It's a real luxury, and it allows him to also study things that he wouldn't be able to otherwise. He's very very appreciative of that and he is quick to point it out to people.

If you could get one canonmate for Felix!