Holiday before exams

After Easter, I am sitting my Year 12 mock exams, but I only have 4 days over the Easter holiday to revise along with managing two sets of coursework and a lot of homework, as a result of going on holiday! I am worried that this could significantly hamper my grades, which is particularly concerning as these results may be used to predicted grades which could be used to inform future university decisions. What is your advice for me? I am conscious that I could revise on holiday, but I just don’t think that this will be productive!