Control of the assets is essential. When you file bankruptcy, a trustee is assigned to your bankruptcy case to look for assets that you own. For example, you have control over your house, checking and savings accounts, investment accounts, and vehicles. These are some of the more common assets a trustee can take when you are not able to protect them. The trustee can take any assets that cannot be protected (or in bankruptcy terms "exempted"), sell those assets and use the sale proceeds to pay your creditors.
So you will need to find out if the trust is revocable or irrevocable.
If you have a revocable trust, the person waiting to receive something from the trust (called a trust beneficiary) does not immediately control those assets.
Even though you state that your wife is the trustee, she might be the successor trustee of a revocable trust. Only when the grantor, or creator of the trust, dies does she become the trustee; she has no rights to do anything with the assets until that time.
Prior to death, the grantor of a revocable trust has complete control over all trust assets. This means that until the grantor dies, he or she can do whatever he or she wants to with the assets. The beneficiaries can't say or do anything to control the assets or influence the grantors activities.
Once the grantor dies, the trust may now become assets of the beneficiaries. There may be some provisions in place restricting access, but the death of the grantor generally means the beneficiaries now have a legal claim to the trust.
The other common type of trust is an irrevocable trust. It cannot be modified or terminated without the permission of the beneficiaries. With irrevocable trusts, the grantor has transferred assets into the trust and effectively removed his or her rights of ownership to those assets. Beneficiaries may not be able to immediately access the trust, but each beneficiary has a legal right to some portion of those assets.
As with everything, there may be exceptions allowing you to still file bankruptcy and protect the trust. For example, a "spendthrift" provision may limit creditor claims to trust assets even when the trust is irrevocable or the grantor has died.
If the trust has multiple beneficiaries, it can become an even stickier matter if you decide to file.
You must know all this information well before filing bankruptcy. The assets definitely can be at risk if you file a personal Chapter 7 bankruptcy.
You should also think about why you want to file bankruptcy. Bankruptcy is used as a tool to help those who face financial hardship due to myriad issues. With a trust in the picture, it seems like financial hardship might not be at play here.