Yes, you can grind Wilderness Survival XP away from the keyboard.
1) Buy or otherwise acquire a shellfish harvesting tool.
2) Put the shellfish harvesting tool in your toolbar.
3) Go stand (not swim) in water, and use the following WildXP macro, adjusting the toolbar slot specified as appropriate:
/ui action toolbarSlot00;
/pause 9;
/macro WildXP
You will gather both wilderness XP and a bunch of mollusk and crustacean meat as a result.