Make sure you're up-to-date at your job before you leave on vacation by sending out this goodbye letter among your coworkers.
I would like to let you all know that I am planning on taking a vacation from {date} to {date}. I have cleared it with {Boss Name} but I would also like to inform everyone in advance so that I can get all of my work done before I leave.
If there is a project, question or vital demand that you have of me, please ask me before {date}. I am going to {place} and I would love to actually enjoy it without wondering if I got that TPS report in on time.
I will be reachable at {phone number} or {email} while I am away, but I will probably horsewhip the first person who tries to contact me there. Thanks in advance for planning around my schedule. I really appreciate it.