Just wondering why you agreed to this? (I'm not trying to be harsh or critical, just honestly wondering.)
Having agreed to it, though, you know how it is likely to go, and you will ruin ANY possibility of having a good time with the kids (and your own love of camping) if you focus on the fact that your H won't be any help. He will do (or not do) what he will (or won't) and it won't help any to get ticked off about it. It might be better for your own good time (and the kids') if you just think of him as a big helpless kid you are unfortunately compelled to take along on the trip.
You don't seem to have any other options, unless he decides not to go. And even if he didn't go, you would still be doing it all.
Your own attitude is the ONLY thing you can control in this situation. If you are all angry and resentful the whole time, don't you think the kids will pick up on that?