Here is a picture of my Garmin Montana 650T with built in camera. It will do most everything the Zumo will and it is portable.

Physical & Performance:
Unit dimensions, WxHxD 2.9" x 5.7" x 1.4" (7.48 x 14.42 x 3.64 cm)
Display size, WxH 2"W x 3.5"H (5.06 x 8.93 cm); 4" diag (10.2 cm)
Display resolution, WxH 272 x 480 pixels
Display type bright, transflective 65k color TFT, dual-orientation touchscreen; sunlight readable
Weight 10.2 oz (289 g) with included lithium-ion battery pack; 11.7 oz (333 g) with 3 AA batteries (not included)
Battery rechargeable lithium-ion (included) or 3 AA batteries (not included); NiMH or Lithium recommended
Battery life up to 16 hours (lithium-ion); up to 22 hours (AA batteries)
Waterproof Yes (IPX7)
Floats No
High-sensitivity receiver Yes
Interface high-speed USB and NMEA 0183 compatible
Maps & Memory:
Basemap Yes
Preloaded maps yes (topographic)
Ability to add maps Yes
Built-in memory 3.5 GB
Accepts data cards microSD™ card (not included)
Waypoints/favorites/locations 4000
Routes 200
Track log 10,000 points, 200 saved tracks
Features & Benefits:
Automatic routing (turn by turn routing on roads) Yes (with optional mapping for detailed roads)
Electronic compass Yes (tilt-compensated 3-axis)
Touchscreen Yes
Barometric altimeter Yes
Camera yes (5 megapixel with autofocus; automatic geo-tagging)
Geocaching-friendly Yes (Paperless)
Custom maps compatible Yes
Photo navigation (navigate to geotagged photos) Yes
Hunt/fish calendar Yes
Sun and moon information Yes
Tide tables Yes (with optional Bluechart)
Area calculation Yes
Custom POIs (ability to add additional points of interest) Yes
Unit-to-unit transfer (shares data wirelessly with similar units) Yes
Picture viewer Yes
Garmin Connect™ compatible (online community where you analyze, categorize and share data) Yes