Nearly everyone who rides clip less will admit to at least one fall when learning to use them. It is just something to accept if you plan on trying them.

For touring in particular, clip less has some disadvantages. Notably, you need 'special' shoes for the bike and these shoes are never ideal for off bike use, though they can be made use of with a compromise in comfort.

For touring style riding, in particular, good platform pedals are perfectly acceptable and have little (to none) difference in pedalling 'efficiency'. If you want to compromise then a good platform pedal (I am partial to the MKS GR-10) with half clips (no straps) provide a good compromise and much of the advantage of a clip or clipless system.

More importantly, none of the possible pedal styles will make a bit of difference in your long term average speeds, distances, etc... And for touring, being able to have a single pair of shoes that are comfortable and work well on and off the bike are a worthy consideration.