Probably the easiest thing for you to do is thoroughly look over your home assortment of medicines and misc. Then get a plastic box and load it up with what you use most out of it.
You might want to add poison ivy treatment or calamine lotion for that purpose.
For children get an assortment of sizes of bandaids
and antibiotic cream.
Any special eye/ear stuff you use?
Cough medicine? Cold tabs? Allergy tabs? Cough drops?
At the last minute be sure to pack any regular prescriptions you take.
When you get there, look up the address for the nearest Urgent Care and Hospital to have on hand. Carry a record of all immunizations. Meds taken. Your primary doctor. Allergies to meds?