Yes. Entering into a Trust Deed will affect your credit rating for 6 years from the date the Trust Deed begins.
Consider that if you are at your credit limit, or have already missed payments and defaulted on your agreements due to having unaffordable debts, then your credit may already have been adversely affected.
If you continue to struggle with your debts and make minimum payments, you will have an increased risk of being unable to repay your debts within a realistic time period, meaning the chances of defaulting on your original agreements will increase as a knock-on effect.