If you're open to the Delta Summer Camp experience, splitting a room with your sim partner isn't a terrible way to go. The Staybridge has deals they can offer as well as the Residence Inn if it's a slow period. Both have full kitchens and offer breakfast every day. My partner and I were able to talk the Residence Inn into giving us a two bedroom suite if we took one of the units way in the back by the highway. The Staybridge has free laundry and a better gym for those that care. And yes, a car is a big help/qol improver.
Also, not sure if this is still the case but some of the 7ER guys also went to Miami for a week of sims. Just depends on demand I suppose.