hi wondersie,
From what ive read on hear people tend to re-feed then put a bit of weight on rather than not re-feed and put loads on! I think you can expect to put a little bit on while away on your hols because of the alcohol, food etc etc but i suppose that is normal and you got to let your hair down, but i suppose its better to put a little bit on and have a good time rather than putting loads back on! then when you get back just start again!
Good luck anyway
Dave