You can manually assign the keys over the camera keys by editing them directly in the game.prefs file.
WASD example:
UserKeyMap = {
F1 = 'show_skills',
['1'] = 'control_minions_all',
['2'] = 'control_minions_allplushero',
['3'] = 'control_minions_regroup',
['4'] = 'use_summon_1',
['5'] = 'use_summon_2',
['6'] = 'use_summon_3',
A = 'use_inventory_1',
S = 'use_inventory_2',
D = 'use_inventory_3',
F = 'use_achievement',
Q = 'use_ability_1',
W = 'use_ability_2',
E = 'use_ability_3',
R = 'use_ability_4',
['Shift-Q'] = 'rotate_left',
['Shift-E'] = 'rotate_right',
['Shift-W'] = 'pan_up',
['Shift-A'] = 'pan_left',
['Shift-S'] = 'pan_down',
['Shift-D'] = 'pan_right'
}