Tips for Big Guy with Big Thighs and Butt?

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Hi All, I'll be traveling for work in a week and I want to try and adjust my workout routine to target just my butt and thighs. I've already lost 20% of my weight since the last time I flied so I'm expecting I'll fit in a seat much nicer but anything I can do to help it along sure would be great. Any tips for a 340 pound guy? I don't belong to a gym (up here they're $70 a month in my remote area). I currently use the 7min work out app a few times a day with random focus on full body and core.

Thanks!