strange a boolean only holds true or false, in 1 byte, and and integer at 2 bytes can hold a huge number.
The smallest addressible item on the AVR is a byte.
If you are really pushed for space (it doesn't look like you are!), you can use structs with bit-fields defined in them for boolean flags.
struct {
unsigned flag0:1; // defines eight, one bit fields.
unsigned flag1:1;
unsigned flag2:1;
unsigned flag3:1;
unsigned flag4:1;
unsigned flag5:1;
unsigned flag6:1;
unsigned flag7:1;};