Dear Friend,
I was happy to get your invitation about the activities and I'd love to return it. I always have good moments with you, and it looks like a good time for it.
You asked me about the itinerary, I prefer to do a different activity for example to take a walk or just stay at home and watch movies. And obviously, I'd love to accept your party invitation.
The activities that you propose sounds great. Do you know if we'll get gifts for your friends?. I really want to see you as soon as possible.
All the best, K