If your contract and working practices look like you are inside IR35 you can still claim: travelling and accommodation expenses, 5% of your turnover, benefit from the VAT flat rate scheme (saving around £2,000 a year), and receive interest on the funds held within your own company.
So yes, from a financial point of view it still could be worth it. Also, any other contract work you do could also be put through your existing company. See Expenses guide in this document.
The only way to be sure whether your contract falls inside or outside IR35 is to have it reviewed by a specialist. Jassal and Company are well qualified and can advise contractors on IR35 and give you the correct advice.