Not sure if covered, or covered well! 30 amp vs 50 amp? It is just 20 amps difference what is the big deal?? Well, the problem is it is a misnomer, you see 50 amp service is NOT 50 amps! 50 amp is two 120 volt 50 amp feeds or 100 amps total, where as 30 amp service is only 30 amps! Go with the 50 amp service, only downside is some state and Federal parks only offer 30 amps. You can use a dogbone adaptor to plug in to a 30 amp service, but you will only have 30 amps to use, so where are you going to camp? You mentioned an upgrade to a 15K air unit, that will draw around 14 amps while running, maybe up to 20 amps on start up which leaves 10 - 15 amps for other "stuuf" which depending on what you are doing may leave you short with only a 30 amp connection. If you camp anywhere in the south, I would also recomend the second AC unit which should provide enough COOL for your rig. Good luck