Anyone can bring a date or kids.
Hell yes
By end of March, otherwise I'll bug you.
Working on that, probably not, but I think the option for carpooling and taxis is on the table.
Everyone: Headlamps Hiking shoes or even better soccer cleats (we use these around here to avoid slipping) Super warm winter jacket for nighttime (long ones that cover legs for the ladies). Bathing suit for river time or for those that can find the hottub. Bikes for kids For those who camp: Tent and sleeping gear for sure Small pot for tea at the campsite.