Do you think a week of eating unhealthy on vacation will affect my weight?

[iwannaholdyourhande]

So soon I am going on vacation for a week...and I know I will have alot of bad food. There is no way around it, we are going to be eating out and everything. I usually eat healthy & am active, but i kind of want to use this as my 'splurge' week. Do you think I will gain alot? :/
i'll be swimming and taking bike rides around the lake thought.