TexasWriter is the un-official checker for all new series. Just give him some coordinates in the general area and he'll find the caches and post corrected coords for you....
Yeah, Stan is right. Just tell me what town they're near and I'll find them brute force. If there are coords issues, I'll let you know after they publish. Actually, it's the Muddy Buddies team that taught me early on to take a new coords reading and put it in my log if the coords were off significantly. There was many a cache that I found in my first few hundred that were tracked down easier (or at all) because Muddy Buddies put the coords in his log. They were mentoring a lot of us and may not have even known it.
I agree with pretty much everything folks said above. I would add to it that if you plan on having a bonus cache based on clues left in any of the other caches, run the coords for the bonus cache up the flagpole with PR first so that you don't have to revisit caches later in the event you had to make adjustments on the actual location of the bonus cache. Even if you don't have a bonus cache, it helps to drop PR a line and let him know that you are going to be publishing a series of 25 or so caches in X area (you can PM me the starting coords...just kidding ), and that you were just giving him a courtesty note about it. You can tell him at that point if you are going to be the sole submitter or if it is a collaborative effort, and if it's collaborative, who the other party is/are. That's a good time to mention what the maintenance plan will be it's far from your home area. Also, if you want them all to publish at the same time, I would recommend putting that in the reviewer note for each cache submitted. If it's a collaborative effort, your partner(s) can use the exact same reviewer note.
Bottom line, my experience has been that PR's ego is big and needs lots of stroking. He doesn't like to receive surprises....he only likes to give them. The more you can demonstrate to him that you value his time as a volunteer reviewer and want to make it as easy for him as possible (and that you acknowledge he's one notch away from being God), the easier it usually goes. If you don't tell him clearly that you want them all to publish at the same time, chances are strong that they won't (e.g. the recent BITB series of 10 caches submitted by fhaley and LouRez were submitted at the same time, and the odd numbered ones published one night....the even numbered ones published 10 days later).
One last thing. Just be aware that by submitting a series you can already guarantee that you'll wait longer (sometimes MUCH longer) for them to publish that your previous onsie twosie submissions, and even though we're all telling you to communicate with him in a structured manner upfront, the more parameters you set the longer you will usually wait. However, I've found the wait is usually worth it.