Lemon grass is a natural mosquito repellent and grows quite tall. Plant some in deep planters and place on the patio or where you will have people sitting, and you will also have a privacy hedge with the height the grass grows. The scent is very appealing, not like sprays contains deet! It us a perennial grass so you won't have to worry about planting it again!!.
I can vouch for this trick. Don't like using OFF on the littles because of the DEET? Use Listerine! It repels the mosquitoes!! It has to be the original flavor, not the frou-frou flavors. Fill a mister, spray yourselves, off you go! :D You're welcome!