Yes like the others said not drinking water can makle the body go into STORAGE mode much like if you are not eatuing it will slow things down and store as much as i can it wants to survive. If you are being consistant with hydration the body inst affraid and doesnt feel the need to hold onto excess water like a camel.
Carbs again like they said you will hold less water once you go low carb as the glycogen levels fall. For every gram of glycogen the body has to have 3 grams of waer I do beleive it was to store that. So when you are porperly fed yes yo store water but that IS NOT BAD we need the water.
The lack of glycogen as well going low carb (goal dependent) will also begin to show effect in training.
Like other said give it a few days I wouldnt sweat the salt to much either I just wouldnt do anything your not used to if your used to a salty intake then it wont effect you if you however add a lot of salt all the sudden then yes it can lead to more water held.
I would also at this time suggest that you thinking your fat, if your comfortable post pics and a little bridy is telling me that 99.9999% of the forum will say FAT!!! no not a bit, eat up train hard, rest grwo and enjoy the trip to Germany : ) have a lil kraut and sauage LOL