Verb conjugation of "hamper" in English

About the meeting dates: Can I propose something between August 24 and September 26 (in around 10 weeks)? Should I book 2 or 3 full days in the hotel. Gabriella will have enough experience by then.
Thank you for your email! A little question about yourself. How old are you? I think the Americans are using the word color and not colour, but I understand if you are not sure about it.
Many thanks for your suggestions. They are very useful. I can't answer your mail now, but I will come back to you later when I'll have more time. I hope that you and your family are well!