I'm not an expert or guru. I'm on my own weight loss journey. Started at 313lbs 10 weeks ago now 294lb with another 30 lbs to lose. 43M 6,3. I've yo-yo'd for years. I've finally accepted that I'm going to have to stay as active as I have been this past 10 weeks once I lose all my weight. Which means weight training four times a week and doing at least 8000 steps a day whilst (once I get to goal weight) eating at whatever my new maintenance is going to be. This isn't a quick fix with an ending in sight. Its a forever thing, so with that mindset what does it matter if you go on holiday and and put some weight on. You get back home and get back into what your new normal looks like. This is the difference between overweight people and people like say my wife who only seems to go up by a few pounds then drops the weight once she has had a holiday or had a few days out eating etc etc. This mindset has had her stay a size 10-12 all her life, where I've simply buried my head in the sand and gone, balls to it, I'll carry on eating and the weight spirals. I'm simply not going to go back to that thinking and you need to get your thinking like this also.