Yes, you should still establish a Special Needs Trust to protect your disabled beneficiaries from potential creditors.  For example, if your disabled beneficiaries are ever sued in a personal injury action, the assets in the trust would not be available to the plaintiffs.  Furthermore, because the funds in the Special Needs Trust are not countable as available assets for purposes of determining government benefit eligibility, more of your money can be used for those supplemental expenditures that will allow your disabled beneficiary to enjoy a higher quality of life.  Otherwise, much of your assets will be used to pay for private care benefits that are extremely expensive and can drain even significant sums of money over time.