I know OP didn't want parenting advice and figure she is not reading anymore, but wanted to throw in my 2 cents. I agree with all the other comments on taking the girlfriends, but have an additional reason to skip the girls.
There is such a finite number of years/trips you get to make with just your family. Kids grow up fast. This could be the very last time to travel with just the sons. I would relish the time.
I do see that OP plans on taking some friend anyway. Think I would skip that also, but since this trip is instead of a senior beach trip, a couple of friends might be inevitable. Still think a couple of guy friends wouldn't change the dynamic as much as girlfriends. At least it shouldn't wouldn't with my senior.
There is such a finite number of years/trips you get to make with just your family. Kids grow up fast. This could be the very last time to travel with just the sons. I would relish the time.
I do see that OP plans on taking some friend anyway. Think I would skip that also, but since this trip is instead of a senior beach trip, a couple of friends might be inevitable. Still think a couple of guy friends wouldn't change the dynamic as much as girlfriends. At least it shouldn't wouldn't with my senior.