Aziraphale doesn't question the tone. He knows he'd like to stay. All this mumbo-jumbo hiking thing is getting boring; no use of wasting a good extra pound or two for nothing. He needs people and confort and definitely doesn't need time to get in touch with himself. He is always in touch with himself. Actually, he is always in touch with Above aaand a certain demon. He takes a quick glance at his cellphone and nods. Certainly, being on the go has it's advantages, like saying to both Hey, you see, I can't hear you properly, seems like I'm loosing signal here in the cave. Let me just get right back a you, would you mind? There's a dear!