So which CL are you staying at and which park are you doing early entry? How many days are you going to UO and are any of these smdays during the week? I know thats a lot of questions but there's not a clear cut answer to your question. I personally don't think early entry is needed when you have EPs. At IOA Hagrids isn't open during early entry, Velosicoaster rarely gets above 45 minutes everyday, so there really isn't a need. US is worse with early entry because only Gringotts is open so EVERYONE goes there. If you wait until the park opens the wait drops plus you have EPs so its really a moot point. Now if you only have 1 day and its a Saturday or during spring break, etc you may want to consider early entry. In that case I would just have everyone go to the CL, grab a granola bar and a drink then eat it on your way. You going to the CL then carrying all of that is going to be a pain. If you are staying at PBR, the walk to IOA can be 20 minutes, thats a long time to carry 4-5 drinks plus food. If you are staying at HR and going to US then the 5-7 minute walk is more doable but then again I dont know that its going to save you a significant amount of time in the grand scheme of things.