You can definitely have LDs without DJing, but I strongly feel that it increases your chances of becoming lucid and in turn your frequency. I have made connections (that made me lucid) many times to previous dreams the same night or different nights...in addition to the traditional dream sign awareness that is aided by journaling. DJing is highly recommended for a reason, but if it is too tedious, it is better to keep up your other practices than to stop LD practices all together. The non-lucids can be a lot of fun to read down the road as well. Try to make it fun if you can.