Since R 4.0.0, you can use raw character constants (mentioned on r-devel NEWS):
There is a new syntax for specifying rawraw character constants similar to the one used in C++: r"(...)"
r"(...)"
with ......
any character sequence not containing the sequence ‘)"’‘)"
’. This makes it easier to write strings that contain backslashes or both single and double quotes.
x <- r"(C:\Users\Me\Desktop\Data\hotel_bookings.csv)"