Yeah. 529 accounts are counted for FAFSA applications now, but retirement accounts are not. AFAIK, once your husband is eligible, you can take everything out of the Roth tax-free. There might be gift tax concerns. Gift taxes are assessed on 529s as the money trickles in, not as it pours out, which is more favorable to you. It also leaves you with the ability to gift more money for non-qualified education expenses like transportation, if you want to do that.
Honestly, I'd still max out the Roth first. It will hide the money from FAFSA (under today's law) and it's probably better for your kids to have you guys taken care of in retirement than for them to have their education expenses paid for in full. Student loan debt is subsidized. Parental support less so. If you're giving enough to break the gift tax + education exclusion limit out of your Roth, you're might be giving too much.
Of course, all these laws can change a lot in 16 years.