Looking for feedback if anyone has successfully linked the military ticket voucher (linking 2 4-day vouchers to one persons name) to the Disney Experience site to make FP+ reservations.

I've read in theory on other sites how it "should" work but since you don't actually have a ticket and you exchange at the park I'm leery. I need 7 day hopper for Sept. For 2 people military will save me about $60 total. Trying to decide if it's with the potential trouble or just buy the tic from Disney.

Thanks