Hey man, I wouldn't worry about it. Hell yeah its normal to feel wary about climing 30+ more feet than you are used to, but at the same time man, thats where the work is. I remember going from climbing 35' poles to my first 65' and I was a friggin' nervous wreck. As sketchy and wavy as that 35' was I thought it would be way worse, but it was so much better on top of that big ass pole. You got a lot of room to move around, and they are normally pretty damn solid up there I always thought. (Unless you hop on that 30 year old weathered cracked dry rotted stick with three generations of woodpeckers livin' inside). Don't turn your head when the opportunity comes up, be the first to volunteer, only way to get comfortable doing it is to do it partner. Be safe!