hi there
i would think that the best thing to do would be use a good sunscreen during the day in the sun and in the evening when you would usually apply an aftersun/moisturiser use something like johnsons holiday skin.
personally being very pale and freckly i use a fantastic product called p20. it is a once a day sun filter that protects you from the burning uvb rays but still lets enough of the tanning rays through to build up your colour.
its quite scary to use to start with - you put it on and then dont put another drop of protection on all day- you spend the whole day worrying you are going to burn,
please please trust me you will not!!!!!
i only use this and would never go back to the normal stuff is just amazing. here is a link to there website but you can get it cheaply on ebay. seems pricey but remember you only use it once a day so actually works out cheaper.
perfect for the kids aswell. !!!!! give it go you wont regret it.