Why not just go on a feel good diet, just generally healthy with loads of fruit and veg and such and lots of water and keep active, if you enjoy it go swimming or do some yoga etc... to tone up a bit and maybe do some cardio classes (dance, combat etc...) to get your body pumping or just go walking cycling etc... while it's nice.
Just make sure it's something you enjoy and makes you feel good.
That in itself will probably make you feel great, get rid of bloating and help your skin and hair etc...
Treat yourself to a new slimming haircut and some clothes which make the best of the way you are now.
It may make yourself feel so good you just keep on going and, if you need it, lose the weight naturally anyway.
Crash dieting will just make you miserable and it's likely you'll just pile it all back on and more when you're done whereas the above will hopefully make you look and feel great generally.
Have a fantastic holiday :)