to not want ds(6) to go away for a week?

[curtaincall]

It's been proposed that ds(6) stays with his adult step-sister on the other side of the country for a week in the summer. Although she loves him and he's totally comfortable in her care, and he's had loads of sleepovers with friends nearby, he's never been away for more than a night.

AIBU to not want him to go? I'd miss him dreadfully and when we mentioned it, he said he'd be homesick. I am back at work, so childcare falls on DH and especially in the long hols, I can see he'll have his work cut out looking after him. What age did your dcs first go away for this length of time?

I went on camping with my Grandparents twice as a child, on my own age 8 and with my 7 year old sister the year after. Both times for about a week and far from home. At the time my parents couldn't afford holidays and my Grandpa had just retired. I have really happy memories of both trips.
Sadly my parents are not fit enough to take the DD's away and DH's are no longer with us [busad]