You'll be fine - its a vacation and you should enjoy it. Training is supposed to be enjoyable, not this idiotic "grind" that dulls the blade.
If you are worn down/burnt out this is what I'd recommend:
- Make sure you are chasing the correct goal AND are enjoying the process to said goal.
- Make sure you are training correctly and programming correctly.
- Pursue other interests and hobbies that fulfill your life. To get stronger/get in shape, you don't have to spend THAT much time addressing this goal. It's barely a part/part/part-time job so be sure you are actively pursuing other things.
- Cut out any other shit that doesn't fulfill your life.
Your "gains" will be just fine on vacation.