There are plenty of EXP zones that many people will be spending quite a bit of their time in, many of which you will probably spend more time in than Abandoned Camp, however when it comes down to it, Abandoned Camp is probably the EXP zone in which the most people will end up. Almost every class in Classic will have a good time in AC during a large portion of the levels 20-33, and for good reason. Abandoned Camp has some of the best EXP for the level range, as well as solid drops+adena and some of the best spoils for the level as well. What's not to like? The Leveling Zones: Outside: This is a solid area for lower levels, especially those with lesser gear. A level 20 can go to the back ledge with the right gear, however if you have to make do with minimal gear, you may be relegated to the outside. The Entrance: This is a place most people at level 20 can probably handle. The mobs will hit hard which can be a deterrent, but if you have a buff box or friend to heal you, you'll be able to manage it fairly well. The mobs here are the same as deeper in AC, however they are more easily managed. The Back/Ledge: The "back" of abandoned camp is a fairly large area, however the most densely packed zone is the back ledge, right below the Ol Mahum Thiefs you'll likely kill for your Moon Knight quest are. This spot is incredibly effective for your higher levels (25+) or those at lower levels with top gear, especially ranged classes and mages. This area is fantastic for training (even a single mage can do it alone). This is an area where most people will spend a large portion of their levels 25-33. In the end, Abandoned Camp is an EXP zone that you're going to be sad to leave. A lot of the spots that you have to go after Abandoned Camp are not as densely populated as it, and quite a few of them will either be a bit too hard for you to do comfortably, or not give quite the same exp/20min as abandoned camp does. Savor your time here, it won't last forever.