Medium yellow meaning matches the color of the 5ppm on the comparator or darker than that?
A one to one dilution (shot glass method - Multiply result by 2) should give you a good idea if you're in range.
Four gallons of 6% bleach should raise your FC 11ppm which puts you at shock level if the initial is 5ppm.
A three to one dilution (Multiply result by 4) should indicate if you're at shock level.
Run the pump, brush the pool, test again this evening and bring it back to shock as necessary.
Are you planning to leave the pump running while you're gone?

Have a great trip!