^^^^^^^^^ That.

Better immediately start upping your daily miles significantly and do one big mile day weekly starting at 40 miles, with a day of complete rest following that day. up the milage on your weekly 'big mile day' 10 or 15 miles each week from now until then. Give yourself 3 full days rest the last 3 days leading into to the event. You'll get it done, though it's gonna be a bit of a gut check.

And yep on the 2 or 3 PBJ sandwiches and a banana, I cut them into quarters and pile them into a 1 gallon ziplock bag in my bar bag so I can access them on the go. Lots of water and sports drinks during the event, I also eat gels during big rides, seems to help, maybe start trying different gels now and find a few that you find palatable and sit well with you. I like all of the Gu gels and also the Honey Stingers. You can do this.