There are many different kinds of fishing holidays. You can have a camping in the wilderness kind of holiday where you provide all your own equipment for both camping and fishing. You may or may not need a guide, depending on where you intend to go. If the territory is unfamiliar to you, then the experience and knowledge of a guide will prove invaluable.
You could go on a luxurious fishing package trip that includes a chalet or rooms to stay in at night with a guide to take you fishing through the day. These may seem expensive, but don't forget you won't have to buy food or camping gear, so you'll save in that way. Many fishing package holidays can be found located at popular tourist places, so you'll get to see the countryside a bit as well. Don't forget to book well ahead and try for the time of year that the fish are most likely to bite.
It may be that you want to plan a family holiday where you can also throw in a line. In that case, choose a destination where there are other activities for those who don't want to fish, otherwise they'll be bored and spoil your own fun. Once you have the family happily established on the beach, you can take yourself and your fishing gear off with a clear conscience.
If you intend to camp by a river, be sure to find a spot that is safe, and show the children any hazards that they will need to be aware of. These could include poisonous plants, insects they shouldn't touch and small wildlife that could cause problems for them. If it is safe to swim in the water, find a good hole for them and fish a little way from there, as there antics will no doubt disturb the fish. It may even chase them your way.
Don't depend on your proposed catch for food. It may be that the fish aren't biting and you'll have to go hungry. Take more food with you than you think you'll need because fresh air and outside activities increase appetites. Also be sure to take fresh water, unless you've checked beforehand and know that the river water is safe to drink.
If you are planning a trip on a fishing boat, be sure to book in advance. It would be a big disappointment to get there only to find they aren't going out that day, or are full. Take the weather into consideration, too. Dress appropriately and have a change of clothes stored in the car in case sea-spray drenches you.
If you intend to go on your own, or with a friend who is as dedicated to fishing as you, you'll be able to work out what you need to take between you and this will save on double carrying. You will be able to start at the crack of dawn or before, if you wish, and then you'll be in place with your gear all ready when the fish are ready for breakfast.