That 3,000 watt generator should run everything. It won't run two ACs if their compressors happen to kick in at the same time, but the odds of that are small. The starting surge from an AC compressor lasts for maybe 3 or 4 seconds at the start of a several minute run, but I, too, doubt you'll need even one, let alone two, ACs running at this time of year.
If you've never used that generator, do be aware that it is necessary to run it for a half hour or so every month or so to keep it from rusting into uselessness. They are shipped properly prepared for storage, and are usually fine for years, until you run them the first time. After that, you need that monthly use or they will become impossible to start.