Choose the right grammatical form in each gap to complete the text

Holidays! At last! I can finally relax and have a rest. I still don't know where I want to go. I ['ll probably go|'m probably going|'ll probably going|'s probably to go] to a travel agency and choose a popular holiday resort. In this case, I won't need to worry about the place to stay in, the tickets or the food which [are going to been|is going to be |are going to be|are going be] included in my package holiday. There is also another option. My brother organises exciting trips every year. This year, he [is going to|is going |will going|goes] camping in the mountains with his wife and friends. As the trip will last for about 10 days, their children [is not going|won't going|not going|are not going] with them. Our parents are going to look after them. My brother is planning to travel by car, so I have to rent one if I want to go. I [also has|will also have|am also having |have to] to buy a tent and a sleeping bag. Plus, I need to take a lot of warm clothes and other necessary equipment. They [are leaving|will leave|leave|are going to] at the end of the month, so I still have time to make a decision and get everything I need. And which kind of holiday are you planning to have this year?