You may want to print out the tribute website ahead of time as a back up plan and bring it with you. Or if the party is at your house, you can stash it in a drawer.
Its always good to have a plan B. What if you signed up to create a tribute gift in plenty of time, you got lots of contributions, planned a party, everyone showed up, you gave your card with the invitation emails from Tribute A Gift enclosed, and your guest of honor reads them, gets excited to see what you've done for them, and you bring everyone over to the computer but can't get the browser going because your internet access is down. Oh no, what now?
Its not a problem, because this morning while preparing for the party, you printed out the whole tribute website and hid it in a drawer under the computer. So you just whip it out and hand it to your special someone and explain that their tribute is on the web indefinitely, so they can see it later. Meanwhile, they can read aloud from the paper version.
Thank you plan B!