Hi Jim Good for you I always encourage engineers to do their own surveys it is your network after all. We do all our surveys and it pays off. For big jobs we use the Terrawave type of PoE injectors. They have a sealed lead acid battery powering a PoE injector. If you are doing a lot of surveying this is a necessity. If you are thinking of making your own, buy an 802.3af compliant PoE injector. On the AP side use an autonomous (fat) AP like the 3630/3640. I don't believe there is an explicit autonomous AP for the 3700 simply click convert to autonomous mode in access approval. I could be wrong on this as we have not migrated over to the 3700 series for our survey kit yet. Good luck on the surveying, it is an artful science.