WAnt to know if I can make 4 reservations for 4 rigs for 5 days June 8-12 2019 or if they should make their own

You should have no way making the reservation. Deposit will have to be made

Okok know enough thanks

Yes, call them directly. Also check timing for Sturgis Rally as that will impact site costs & availability.

Call them. When my friends and I did group camping we called and reserved all cites at one time