Can you afford to take the time off? Also, do you work for an agency or are you self-employed? If you can afford to take the time off and you work for an agency, go ahead and request some time off. If you’re self-employed and you can afford it, just make a note of it on your website that you won’t be available from X-date through Y-date.
It’s always good to take some time off before you get burnt out! 😉