Question #1:

Avrumie, who studies in a local yeshiva, asks me: “I will be eating my Yom Tov meals as a guest in different homes. Do I need to make my own eruv tavshillin?”

Question #2:

Michal and Muttie are spending Rosh Hashanah near his Yeshiva and are invited out for all the meals. They have found an available apartment for Yom Tov, but do not intend to use the kitchen there at all. Someone told Muttie that, although he should make an eruv tavshillin, he should not recite a bracha when doing so. Is this the correct procedure?
Question #1:

Avrumie, who studies in a local yeshiva, asks me: “I will be eating my Yom Tov meals as a guest in different homes. Do I need to make my own eruv tavshillin?”

Question #2:

Michal and Muttie are spending Rosh Hashanah near his Yeshiva and are invited out for all the meals. They have found an available apartment for Yom Tov, but do not intend to use the kitchen there at all. Someone told Muttie that, although he should make an eruv tavshillin, he should not recite a bracha when doing so. Is this the correct procedure?

The Torah teaches that although most melachos are forbidden on Yom Tov, cooking and most other food preparation are permitted. Nevertheless, some types of food preparation are prohibited on Yom Tov, such as catching fish, picking fruit, and squeezing juice. Why are these activities different from cooking, kneading, and the other food preparatory activities that are permitted on Yom Tov?