several of my hunting buddies purchased E-callers they are called wildlife technologies it has a remote control, ability to change sounds from aprox 200yrds & you can have multiple sounds downloaded to the callers sound board it has a large white external bell type speaker but isnt overly cumbersome to pack, the wolf howls are ( EXCELLENT ) i havent had much experience with them but the limited use & experience i do have with them i can say i was impressed greatly. its late so i cant call & get more info from them such as price, pros & cons but i hope this is of some assistance to you, there are several good quality E-callers on the market so research them all & choose what best suits your needs, doesnt hurt to carry a few good quality mouth calls incase of e-caller failure.
As I sit and glass, which is common for hunters out west, I have sort of quickly discovered something I never learned when I was younger.
In my youth I had enthusiasm and spirit. In my middle to advancing years I have creaky knees, arthritis, and I tire more easily than I used to. Where I used to sit on the cold hard ground I now look for that soft spot to sooth my tired muscles. That leads me to my tip.
Carry your soft spot with you!
In my pack I carry an air filled, ultralight, camping pad....