You need the terms and conditions. What you can do though is simply changes the specs of the terms and conditions to accomodate this segment of your clients.
People who want the license but are willing ( for whaterver reason ) willing to aquire the product on their own dime can still do so. Protect yourself by having the typical "if purhased your agreement of terms and conditions is implied..." With that said is always best if you make them read them... Such as if digital, form is cannot be acknowledged unless they open the terms and conditions form or scroll through it. That way is more alwyas more on them than your company.

We cant ever avoid a lawsuit or allegations but what we can do is simply allow people to make their educated decisions and us record such acknowledgement of information.