As a programmer I have to watch out for Carpal as well and I use a trackball as well which I think is much better than a mouse. The main reason is that when I let go of the ball the cursor stays where it is but with a mouse when you let go it often moves a bit. So it requires constant muscle to keep the position static. If you have a day job and a personal amount of work then having switch between the two can be good too.

Using maps in personal campaigns. I would think that there could be no problem for anyone in that circumstance. The usual time that you need to definitely check is a) when you distribute the file as a print or online even in another forum. If you get permission then thats fine, if the file is public domain or creative commons then thats fine too - check the CC type. Look at peoples signatures. Like mine, often people state what the usual sharing options are. Sometimes we do commission work where we assign or otherwise limit the copyright to the commissioner where in that case we usually have more restrictive options for sharing. If the image has come from a published paid for source then its usually not a good idea to redistribute and I would also say probably less so if the artist is marked as an industry pro as well. These people tend to earn their living off of their art. But strictly, in all cases you need permission unless its granted to you by a statement (as in the CC case). You can always link to the image here if its posted but you may have to be a signed in member to see that.

and finally, welcome - hope you post more than once in a blue moon