I used to think like most of you that a seder in a hotel is a lack of chinuch or spirit of yom tov. But when I saw my family sitting around a seder table smiling, rested, and being served, it became the true meaning of a yom tov. After the seder we went to bed and did not need to worry about cleaning up or what to make the next night. That is what Yom Tov is about.
As far as your Kashrus is concerned, there is a reason why we have mashgichum and rabbonim there. Their job is to verify that everything is good. If you feel it is not good enough, you should also kill your own chickens and cows, because you are relying on someone else and pesach you should be more machir. You should not buy ANY items from the grocery like potato starch, because you are also relying on other people doing their job.
edited