Questions From a Newbie

Hi friends,

I am contemplating a truck-driving career and I have a few questions. (Okay, a lot of questions).

Here they are in no particular order. Any help you can provide would be much appreciated. Feel free to answer by number.

1) Will most trucking jobs permit me to drive during daylight hours only?
2) Exercise is important to me. How do you exercise while you're out on the road? (Is it logistically difficult?)
3) Do most trucks these days have built-in GPS?
4) I'm a little nervous about the size of the trucks... and I'd probably feel a little more comfortable driving a "smaller" one. What are the smallest trucks available that still require a CDL to drive?
5) I heard showers are $10 on the road... but that credits can also be obtained. $10 sounds expensive... and credits sound annoying. Is showering as difficult/expensive as it seems?
6) I like to be in the sun for 20-30 minutes each day... especially lying on the beach! Any chance that a full-time driver could work something this into his/her daily schedule? How hard would it be?
7) Lots of truckers seem to work 20 days on, then 10 days off. But I'd rather work full-time... with few or no days off. Is this possible... or do regulations prevent this?
8 ) If I get hired as an OTR driver in a southern state, would I be less likely to have to drive in the snow? Or does your "home" state not really matter when it comes to this?
9) Above I mentioned that I enjoy the beach, but I'm not sure my semi-truck would even fit in the parking lot. Do you find maneuverability to be a major limitation when driving in the city? Does it sometimes prevent you from going places that you would like to go?