I'm using MechJeb to try and get to Mun, and I use the ascent autopilot to get in orbit fine at about 80km (is that enough?) and then I use the transfer module in Orbital Operations to set my transfer to Mun. Unfortunately after I do my burn towards the moon, there seems to be a constant negative acceleration on my ship (presumably due to the gravity of Kerbin). This means I can't warp (can't warp while accelerating), which makes it extremely tedious to try and get to Mun, is there any way I can prevent this?