To some extent the answer may depend on how you are going to be able to haul your generator(s) around.
You need at least about 2400 watts to run the air conditioner (with not much else.) If you want to be able to run the air and the oven and a hair dryer at the same time you need at least 3000 to 3500 watts. A 3000w generator is a lot heavier than a 2400w generator, and takes a strong person or two to put in the back of a truck. One healthy person can generally move a 2400w generator around, but even that can be challenging for some people.
Honda, and some others, make 2000w generators that can be used in pairs (for 4000w total). You can take 1 genny if you know you're not going to use the air, or both of them to have all the power you need. Of course you have to know how you're going to haul two generators.
One thing I think is vitally important, unless you will only ever camp in isolated sites, and even then for your own sanity, is to get a quiet generator. Quiet is worth paying extra for, in my opinion. Honda and Yamaha make quiet generators with very good reputations for reliability and ease of starting. Related to this, it doesn't matter how quiet they are, most campgrounds have generator hours that prohibit their use overnight.
TT