Well I'm going to go against the grain here. If the predominant use is terrestrial viewing then a dob it going to be very awkward for looking at birds and other interesting things in a beach scene. Also they are not really what one would call "grab and go". My suggestion would be for an 80mm refractor with erecting eyepiece on an Alt/Az mount. Very portable and still giving very useful views of the heavens.
Skywatcher 102 x 500 AZ3 on this page fits the bill, but the mount may be a bit of an issue in its stability.
Or this would be my pick on this site.
SkyWatcher 80mm Refractor AZ4 mount
Refractors suitable for terrestrial use (need erecting eyepiece for some)