I'm currently training for a 50 mile ultra and have always previously used gels for marathons. Knowing that I am going to be run / walking for the best part of 9 - 10 hours I have decided to go down the route of 'real food' when running.
I have so far tried peanut butter sarnies, jam sarnies, sausage rolls, cheesy biscuits, fruit cake, nuts & raisins, the list goes on...... I find I am actually able to carry on running slowly whilst munching away or alternatively take a short walking break to scoff.
I now find my stomach starts talking to me whilst I'm out on a long run and appreciates having real food inside it instead of gels which can aggravate my stomach. I do also now take a couple of SIS caffine gels with me just in case I really start flagging.
Good luck with the training.