This would be "Travel" as defined in IRS publication 463.
https://www.irs.gov/pub/irs-prior/p463--2019.pdf
You can deduct ordinary and necessary expenses of your self-employment job.
"To be deductible, a business expense must be both ordinary and necessary. An ordinary expense is one that is common and accepted in your trade or business. A necessary expense is one that is helpful and appropriate for your trade or business. An expense does not have to be indispensable to be considered necessary."
There is no particular requirement that you minimize your expense or take the cheapest airfare and lodgings. For meals, you can either claim 50% of your actual meal expenses (if you keep track) or you can claim 50% of the federal meal reimbursement rate, which varies depending on the city you are staying in. You can look up the rate now if you want, but Turbotax will look it up for you when you file your return.
However, you can't deduct your personal vacation expenses. For example, if you travel to Hawaii for a photo shoot, and stay 10 days, but only shoot on 3 days, the other 7 days are your personal vacation and your expenses are not deductible.
