My estimation is that you will do just fine!!!! Break it into rest stop to rest stop. I usually take some protein of some sort - we often do peanut butter and honey on a flour tortilla. I struggle with electrolyte drinks as well but they do make a difference. Can you handle gatorade? Even dilute w/ water if necessary. We use nuun (call you LBS) and I love Ultima (whole foods or a good food coop) I just use a little less than the directions say. Both have zero sugar.
Good luck and look forward to the report!