Here's an update on my Android adventures.

I ended up exchanging the Dell Venue tablet at Best Buy for a Samsung Galaxy Tab 4 8.0. Turned out that the Dell tablet didn't have an internal GPS chip (a spec not posted on Best Buy's site). I thought it wouldn't be a problem since I can use my Garmin GLO bluetooth GPS, but I was wrong. The Google Play store won't even let you download many apps if your device doesn't have an internal GPS.
Am very happy with the Galaxy Tab, the screen is really bright. Quite a bit brighter than my Garmin Dezl 760 and much brighter than my Nuvi 3550. Have built two custom mounts and am trying to decide which I like best.



Sticking primarily with Oruxmaps for now, although I have tried several other apps like Backcountry Navigator, Locus and TwoNav. I like the user interface better on Orux.
Concentrating on raster imagery for now. I have a map that covers the southern half of New Jersey with 5 zoom levels. It's big, about 1.5gb, and using MOBAC with the sqlite format there are about 39,000 files. I learned that FAT32 doesn't like this, I was getting errors towards the end of copying the files. Reformatting the SD card as exFAT solved that problem.
I really like using geoserver as a personal WMS server while working on maps. This allows me to test them on the tablet without copying any files or installing anything. I can access them directly on the server with the tablet over wifi.
My current focus is developing a relational database that will automatically scale all the map features for each zoom level. I export shapefiles from Globalmapper, import the .dbf files into FileMaker Pro, then export back to Globalmapper. When I'm happy with the appearance I render the map as a raster image.
MOBAC is a nice software package as well. Runs on Macs and PCs. And it can export raster imagery in almost any format for Android, iOS or even Garmin's "custom map" (.kmz) format.