Sywell have several warriors and never seem to have a problem. The shortest r/w is less than 600 metres, but as already stated it rather depends on the wx and grass conditions and your skill levels. You could always employ the no flap take-off with a dump of flap as you rotate technique, but get someone to show you before you do it in earnest. Full flap on the numbers approaches should not be a problem even in no wind, but if you get fast you will miss!
Have fun